>> i finally get a hold of dad and i was like, "what's going on?" and he's like, lisa's been shot.nd i just said, "my -- my lisa, my lisa." she s a newlywed and mom-to-be. then someone took it all away. >> everyone's like, "do you want justice?venge? i just want the truth. >> reporter: fingers pointed to the neighbor with a simmering gr escalating. they were fearful. i was fearful. >> go get him! go get him now! >> i thought, "they better get i do."

rumors of trouble on this side of the fence. a husband's lust --"she sent me some topless pictures?" >> yes. >> did you see them? >> yes. >> reporter: then a wife's posed. >> that was her biggest secret. a case that would test three juries and shatter two families.ing one terrifying truth -- >> reporter: this has gotta be just more than your brain can absorb. >> definitely. >> it's heartbreaking.y hit me in the stomach. >> reporter: the cornfields of iowa. piece from memphis. but it was here, in ottumwa, iowa, a baby girl was

lisa marie.t one. >> as a kid, i was pretty big into elvis. of elvis, of course. >> reporter: just as todd caldwell hoped, his little lisa lived up to her big name. >> she was just the life of the ce she started talking, she hadn't shut up. >> reporter: they're divorced now but tracy and todd caldwell watched their girl grow up all pable. a vivacious, winning teen. bowling, todd, we're not just saturday night now and then? >> no, we're talkin' about a state champion bowler. anything she did, she had to be the best at it.over here. >> reporter: lisa was a teenager when her parents divorced. todd remained an active father to lisa and his three other children.while, he was working a stressful and dangerous job as a deputy in the wapello county sher found comfort in several

one was his occasional hobby. he'd take out his sketch pad ime. and then he met and fell hard for a nurse named amy. before g fatherhood all over again. with twin daughters this time, of help from lisa. she was the twins' default babysitter. she was more like a second mom to the twins than a big sister.regiver to anybody. >> reporter: you had a very close relationship? >> uh-huh, very. with her. we'd watch old episodes of the golden girls. [ laughter ] >> reporter: that's a sweet relationship.ays says that i was dorothy because i'm such a grouch all the time. [ laughter ] but yeah, that was my favorite time with lisa.m so lucky. >> reporter: but step-mom amy put on her enforcer hat when it came to lisa's teenage romantic

boyfriends were. i wanted to know who their parents were. [ laughter ]was the one that they had to pass the test with. >> the boyfriend who passed with flying colors was seth. he came from a long time local family.dfather was the mayor. mom was a social worker, the dad owned a local bowling alley. the bowling alley was where seth as a young teen began noticing lisa. his dad was her high school coach and seth bowled almost but not quite as well as lisa. the two worked part-time together at the lanes. they were becoming boyfriend/girlfriend and that was fine with both families. ung girl? >> a lot. >> she was a part of our family. >> they were a church going h's mom remembers how the compassion shown on a relief mission to mississippi after hurricane katrina.ld talk to the

they became very good friends. i have a lot of memories like that of seth. >> helping people. >> yeah. and lisa wanted to help people, too. she followed her father into law enforcement and then as a jailerng county. >> i told her that she would have my blessings if she wasn't just an average cop.be a really great cop because i didn't want to have to worry about her inefficiencies maybe endangering her life. years of hearing patrons at the bowling alley joke about when they would get married, they made the inevitable >> how did you find out they were getting hitched? >> seth came to our house and met with us and asked us our marry lisa. old school. >> old school.

seth and lisa got married in she was 22, he was 21. >> i just told him that, no matter what he did, to take care of her and protect her. >> and he said? >> he said he would. >> lisa's sister, another much more than a brother-in-law with seth. >> he was my best friend and he was that other person that i could always go to. >> he called me dad. we told each other we loved each other. we hugged every time we left each other.im as i did my son. >> for lisa, it wasn't just gaining a husband, it was having all his buddies come along, too. a package deal. >> how did she put up with you guys?as interested in the same things that all of us were. she liked to go fishing. she liked to go hunting. she liked to shoot guns. he okay? >> sounds like you would have been happy if she were your girlfriend? >> seth was lucky.

but seth knew it was time to settle down and get a real job. like lisa, he was drawn to service. he drew a paycheck as a security guard.dd was the ladder. the soon to start job as a sheriffs. >> they were very close. todd was a big influence on seth. that's why i think he went into law enforcement. for seth. he was going to be a father. they picked a name for the unborn girl, zoe maria. in may 2012, they were halfway the pregnancy. >> seth and lisa, a baby on the way were starting out their married life in this humble little trailer. it was a gift from his dad beautiful piece of property. a starter home to save money for the future. the only apparent cloud in the g feud with an across the fence

it happened at 5:00 in the morning. a sudden horrifying sound that shattered two young lives. >> saturday, may 26, 2012, memorial day weekend. >> not breathing. >> does she have any medical problems?een shot. >> a shotgun blast that ended all the plans of mr. and mrs. th techel. deputies race to the scene where the shooter could be lurking anywhere.e shot you. that was possible the whole time. nothing's left behind. nothing. are you clean enough to go commando? (laughs)

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>> reporter: it was the end of a long overnight shift for sheriff's deputy marty wonderlin, the only deputy nty, iowa. all was quiet and with the first hint of daybreak that saturday morning, marty relaxed and turned up the music in his >> reporter: it's the ragged end of the shift for you, huh?aking my last little loop around the county and going to watch the sun come up and go home and go to bed. >> reporter: that plan came to an abrupt end around 5:30 a.m., when seth techel made a s house.

i'm going to [ bleep ] kill i was getting ready for work and i heard a gunshot and i came the side. >> reporter: dispatch relayed the message to marty wonderlin. the young deputy had never gotten a call like this.f a lady not breathing. i have now been advised this lady's just been shot. pounding a little? >> oh, yeah.at's an understatement. >> reporter: with his car and his mind both doing 90, marty raced to the house in under ten minutes.rise of the gravel country road and stopped at the end of the driveway.he'd be facing. his dashboard camera captured the scene as he approached the house. >> reporter: here's how you get in the trailer. what do you re? >> you could see seth techel up on the porch.

>> sounds like he's crying, just sobbing. >> reporter: the toughest call of marty's career was suddenly so much more complicated.the grieving husband on the porch, considered him a friend, knew his wife lisa too. and her father, todd, was a respected, fellow deputy.y had just become very personal. >> reporter: deputy, how do you set your brain in compartments, professional? this is the first time you've ime, and yet it's also people you know? >> it's tough. >> reporter: were you scared?e. >> yeah, definitely was scared. you know, concerned about a lot of different things. >> reporter: you didn't know if somebody could have winged a shot at you? >> yeah, i mean, that was ime. >> reporter: as the only cop at a dangerous, chaotic scene, the possibility of a live shooter still on the grounds, marty's umping. when he entered the trailer, a paramedic was attending to lisa.

marty's only thought was to help her, but he had to secure his rifle, so he ran back to his cruiser to lock it up. and i think i told dispatch, "get 58 out here." >> call 58 and have him get out here.adge 58 meant deputy todd caldwell, lisa's father. >> in hindsight, i wish i wouldn't have done that. >> reporter: why do you say that? >> well, because i saw a lot of things that morning and now because of me, because of asking him to, there, he's going to have to live with some of those same images that i do now. >> reporter: todd caldwell was asleep, but his cell phone was plugged in next to the bed, always ready for a middle-of-the-night emergency call. >> we get a call from, you know, a dispatcher i've known for 20 years and i can tell that his what i remember, he just said, you know, "you need to get out to lisa's house. she's been shot and isn't breathing." >> reporter: todd's wife amy bed.

friend, needed her. hind. i didn't put shoes on, didn't have socks on. i went in my pajamas and drove 90 miles per hour, you know? i'm an e.r. nurse. i'm thinking -- >> reporter: you're sort of in nurse mode there too?hinking, "well, you know, maybe if i get there fast enough -- >> minutes matter. >> there will be something i could do. todd raced behind in a separate vehicle.ated over and over, you know, "oh my god. oh my god, oh, my god." i just remember that's all i could think and say is, "oh, my god., my god." >> reporter: at the scene, deputy wonderlin ran back to the house and did what he could to help the emt. >> started giving lisa cpr, so -- i think he was getting, like, a defibrillator ready. it felt like forever.i'm asking him, you know, "you want me to do cpr still?" he told me not to. >> reporter: there was nothing more to do. along with her unborn daughter. lisa marie techel was just

>> i ran in there and you could s gone. >> reporter: so you went into the bedroom? you saw her? did you tend to her? >> yeah, i held her hand and i rubbed her belly and i just said, "my -- my lisa, my lisa." >> reporter: todd, did you go into the house? i hope not. >> yeah, i did.e and i seen her laying there and i seen the amount of blood that was on the bed and i knew, from my experience, that that was too n life. when i listen to like the tape recording of it, i hear myself bellowing.ow to describe, but i don't even remember doing that. >> what happened? it was a heartbreaking scene, but deputy marty wonderlin had a job to do.

homicide. you're in the barrel here. >> got to start working it. >> reporter: there was an immediate lead from, of all people, todd caldwell. the veteran cop, who had just ous daughter lying dead in a pool of blood, said he knew who the shooter was. and in a voice filled with rage,eputies to take the suspect down. >> that [ bleep ]. go get him. get him, now. >> who was todd caldwell talking about? turned out there was someone in s life that had everyone worried. >> things were escalating. they were fearful, i was

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>> reporter: lisa techel was dead, murdered in her own bed. her distraught husband seth was outside, shirtless and barefoot. ister >> your best friend. >> yup. >> reporter: seth was ting out. >> i went over to him when i

he pushed me away.ed his truck, and i said, "don't do that, seth, you know, let me see your hand." >> reporter: todd offered to take seth back to his house, but doug t moment his son should be with him. >> it was just bad. i mean, it -- he was sobbing.ust hugged and cried. >> reporter: marty wonderlin, working his first homicide, was the first deputy to speak to seth. how'd that go?im what happened. >> i came running out. and i looked in the bedroom and she's laying there. >> reporter: through the ght husband's sobbing, a story started to emerge. >> he basically tells me that he was in the shower gettin' ready to go to work, and he hears a >> i ripped open the -- shower curtain and i grabbed my towel

ha whoever the -- >> reporter: there's been some >> yeah, that's what he's tellin' me, that someone came in while he was in the shower, shotway before he could catch him. brother. >> i can't -- tell todd. >> reporter: lisa's father todd thought he'd figured it out and t. >> that -- go get him. go get him. now.rage was directed at the neighbor on the other side of the fence topped with barbed wire, a 56-year-old disabled army veteran named brian tate. >> i just reget him. go get him now," and i thought, "they better get to him before i do." >> reporter: brian tate had beenlating feud with his neighbors lisa and seth. todd knew all about it, and was certain his daughter was now ause of it. this is this culmination of bad blood's been goin' on for a month's time or more now?

>> reporter: it started about ore the murder. seth pulled a dead deer off the road along the property line. brian tate later tossed the hide onto seth's property. seth tossed it back, and the battle was on.ral calls to the county, complaining about nasty acts of vandalism. todd caldwell april. and tate pointed the finger at his young neighbor. >> i can't remember names. >> seth, seth techel. >> seth techel? >> yup. >> torkel? >> techel. >> techel.ad owns champion bowl. okay. >> and i'll tell -- i just -- they're good people. tate, does he know that you're the father-in- law of the neighbor? >> no, and i don't wanna tell him that because i don't want maybe what he does or doesn't do. >> reporter: and he thinks trouble? >> right. in the trailer property across the way? >> yeah. if you can, let us deal with it. >> what if -- what if -- what if i'm the one who's gotta catch

todd that dog feces and rocks had been hurled at his home. he then showed todd the evidence.dalism of his home in stark terms. >> he says that he thinks these m and, you know, kind of - - a bell goes off like, "terrorism's kind of aird word to use." and the whole time -- half the time, i guess, he's sitting there. he's -- i notice a shotgun layin' on the ground, you know? and i'm like goin' "that makes me feel a little --" a little twitchy? >> yeah, yeah. exactly. todd sent a heads-up email warning fellow deputies about tate, that he might be dangerous. "i don't wanna be the reason a deputy goes out there and gets hurt." okay, if you go out there, be careful.which means mentally, you know, challenged. >> reporter: in fact, tate did have a history of mental illness.n diagnosed as a paranoid schizophrenic. seth's mother lorraine, a social

mental patients, was worried and talked to both seth and lisa about their neighbor.. this was when things were escalating. they thought that they could, you know, handle whatever. and um -- but they-- they were fearful.arful. >> reporter: on may 15th, just 11 days before lisa was killed, an agitated tate made another ing that the vandalism -- the terrorism -- was esponded again, this time accompanied by fellow deputy don phillips. >> i'm trying to have a conversation with you. you know it? >> i don't wanna be yelled at either. conversation with you and i don't understand why you're walking. >> you're raising your voice at me. >> i, you're right. i am. >> what i'm wondering -- >> because you're not listening.id you think he was a risk, that this was -- >> yeah. yeah. >> reporter: a guy who was capable of flipping out? >> i -- i did. i did.nd now, lisa was dead, and the trailer was a crime scene. marty wonderlin, the first

knew all about brian tate and on him as his candidate for prime suspect. all the direction is heading across the fence to this guy whose name is brian tate. >> it is.nd police decided it was time to pay a visit to tate. they armored up and got out knowing what their suspect might do. >> if you're ballsy enough to break into a house, shoot lisaut, you're ballsy enough to do just about anything. continuacio n la polici a loaded. now preview the cost of your copay before you fill. you can even get one-dollar

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r: on the main street of tiny agency, iowa, bad news traveled fast. a pregnant woman was dead and a gunman was on the loose. just as quickly, fear took to >> the 23-year-old reserve sheriff's deputy was shot and killed in her home in the town of agency. she was five months pregnant. >> reporter: lisa's murder was mtown in 15 years. deputy don phillips, seen here unspooling crime scene tape, hadcracking the case. lisa's dad is one of his best friends. todd and i began the same year at the sheriff's office together. grow up. i just reassured him that we'll figure this out. we'll find out who did this.ver's happened here is really within your family, the law enforcement family -- the county? >> correct. we're a small sheriffs office. we know everybody. kids and

something about that guy next door, brian tate. first deputies arrived at sunrise, they'd been peeking across the barbed wire. just how dangerous was this fussing neighbor?her shotgun blast away from finding out? at 1:00 that afternoon, eight hours after lisa was shot, deputy phillips and a team of ready to confront the neighbor. >> reporter: so the decision is made. "we gotta talk to brian tate." >> yes. of interest that we need to go talk to. >> reporter: did you put your body armor on? >> yes, i did. >> reporter: marty wonderlin did, too.or anything, even a shootout. >> we got strapped up. we're all ready. ready for business.as in the backup car, while deputy phillips and a partner drew line-of-fire detail -- approaching brian tate for an interview. ect. it's very possible in all of our minds that he just shot and killed lisa.phillips team walked slowly up to the

deputy provided cover in the driveway. locked and loaded. had the red dot turned on. if things popped off, we were ready.ter: nerves screaming, everyone was poised for battle, everyone but, it turned out, brian tate. he wasn't armed, or belligerent.e. >> as we walked up there, he was accommodating, got some chairs out for us. >> reporter: this is brian tate, huh? >> brian -- brian did. and we sat down in his front yard. reporter: in the front yard in lawn chairs, his mother and brother by his side. no shotgun in sight. so the cops turned on a recorderuestions. you asked him, "5:00 a.m., where were you, huh?" >> yes. >> reporter: he said he was in ement bedroom, sleeping off a higher dose of medication for his schizophrenia. >> i went to bed about 8:30.. >> yeah, after mom did. fell right asleep. didn't hear nothing.

still asleep when the shooting must've happened before dawn. tate's mother corroborated his 15-hour sleep alibi, though the that mothers can often be biased witnesses. >> did you hear anything in the middle of the night last night or see anything?normally i would've been up doing guard duty with all this that happened. but, i'm schizophrenic paranoid. >> reporter: guard duty.y man called himself a sergeant major and walked the picket on his property line, vigilant ever since his property had been ces, his barn pelted with rocks. deputy don phillips knew all about the vandalism complaint filed. he and todd caldwell were the deputies who'd responded to tate's house just 11-days earlier. they'd downplayed his complaintswas a crank off his meds. >> you said earlier, brian, that you, you'd sit outside here. >> at night? when's the last time you did that? >> oh, it's been a good week or

>> week or so?e to do guard duty anymore. they want me to get sleep, take more medications. >> you were such a calm quiet guy until this vandalism u're just like a different person. >> i was mr. nice guy for a long time. it done me no good.vantage of me, so i'm kinda taking a different >> i mean when -- >> being more serious and more not such a nice guy. >> reporter: after venting about the vandalism, the 40-minute interview was over.ren't done. they'd be back to question tate again. so what'd you think you had when you got back in your vehicle?d a whodunit in our mind. >> reporter: but lisa's step-mom and sister had no doubts whatsoever. >> i thought it was brian tate.estigators knew they still had to talk to the husband. when agents scheduled an official interview with seth for it didn't sit well with amy.

always treat grieving husbands?crying. i'm there thinking, "they're being so mean to him." >> we kinda got into an argument 'cause i'm like, "they have to do that."e cop seth techel agreed completely. he knew the spouse had to be ruled out. he said he was eager to get crossed off the suspect list as le. so he went downtown and instructed his parents no lawyers. >> i remember sayin', "do we need to he was adamant. he said, "no." >> he said, "i didn't do anything." >> "i have nothing to hide."n't need a lawyer." >> reporter: was that a mistake? seth had told his story to one familiar face after another at the scene.t now, he'd be talking to an elite state interrogator, and the tone of the investigation s about to change.

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returned home destroyed. and the longest day of their lives wasn't even half over. >> my remaining kids, i know ecame a shared investigation, the dci providing

expertise, the deputies offering local knowledge and manpower.ny birmingham was lead agent. he hand-picked fellow agent rview seth. >> there was no doubt in my mind that chris was the person that needed to do that interview. >> we only get one shot at it. that this could just be information collecting or we have to be prepared that this could be our suspect.y eight hours after his pregnant wife was murdered, seth's formal interview with dci agent thomas got under way. >> you can just call me chris, iess. you're free to, uh, go out of here at anytime. >> reporter: in the interview room, agent thomas was in the white shirt, back to the camera. to put seth more at ease, a deputy familiar to him sat in. >> you have a job? >> reporter: it started routinely. >> currently, i work out at uh job corps as security, but actually next month i'm coming jail.

given his account twice to deputies at the scene, but this would be his first time on videotape. his story begins somewhere around 5:00 a.m.ly. >> i turned the shower on. i wasn't in there for more than five minutes and i heard this loud noise.id he thought it might be a gunshot so he jumped out of the shower to check on lisa. then made out another sound, coming from possibly the back deck. he said he grabbed his handgun from the nightstand by the bed.the hallway and i will be honest, i had every intention of shooting whoever it was. i don't see anybody. i don't hear nothing. i run back inside.om. and i said, "lisa, lisa, are you okay?"ing. >> reporter: during the interview, seth sometimes seemed overcome by emotion. i couldn't protect her when i'm 10 feet away from her.

why? why?dn't i have done something to protect the woman that i loved? >> reporter: the agent asked seth what he thought had happened. >> let's go with your theory -- intruder, right? i mean, is that fair to call -- >> that's the only thing i can think of. >> what do you think this >> i don't know. you'd have to be a complete -- to walk into somebody's house them. >> reporter: seth then bolstered the cops' leading theory of the crime so far -- that the neighbor, brian tate, had shot lisa. first person that came to your mind? >> tate. my crazy neighbor who thinks >> reporter: seth went into detail about that juvenile tit-for-tat dispute with tate that started over a deer hide. over the fence so he said he responded in kind. >> i did the immature thing, which i admit, i threw it back

escalated for several weeks and intensified with the incident inimed dog feces and rocks were thrown onto his property. that brought seth's father-in-law, deputy todd caldwell, out to tate's house over tate's vandalism complaint. >> todd said that tate, the whole time, was sitting on his front porch and he was rubbing a loaded shotgun.eth said he knew the tenor of the visit because todd had filled him in later. his father-in-law also gave him a strong warning.u're doing off. if your buddies are doing off. do not mess with this guy. person -- >> sure. >> to shoot a cop." >> and i said, "i'm not messing with him.obody else is." >> reporter: the murder weapon hadn't been found so the state agent asked seth about the firearms he kept in the trailer.ad been used. >> do you have any uh guns that

>> i haven't looked.uns is used in the homicide, we wanna know where it's at. >> don't you agree? >> oh, yeah.sk him to write down the guns that are in his house. and he writes 'em all down. >> reporter: inevitably, the agent turned to the sharp-edged,that all husbands with a murdered wife have to answer. wannabe cop that he was, seth what was coming. >> we're going to ask you some tough things, okay. >> okay. >> i know i'm, obviously, >> let's talk about, um, people that are in your lives, and lisa's lives, um, was there any airs? >> no. >> reporter: seth didn't hesitate. there were no other women. but out at the trailer, quite someone was about to put the lie to that rosy marital picture. a good friend of seth's named colton had walked up to the pe at the drive. he told the deputies and agents

pick up his puppy that seth had been boarding for him. the investigg the young friend for info about seth and lisa. a detail that tumbled out surprised them. what was the slton? >> i told 'em that seth had a tracphone.o kind of a secret phone, huh? >> yeah. and he had been talkin' to a girl. >> reporter: the investigators had no idea where this would lead, but the unexpected e might be a girlfriend in the mix meant that they had to get on the horn with agent thomas downtown and pronto.e interview chair, but he could walk at any moment.ut seth's secret phone. seems it wasn't just for talking. >> detell you she sent me some >> yeah. >> did you see them? >> yeah. >> yeah. >> did you see them? >> yeah. , th die t and ercise , helps lowe r blood suga r.

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r: seth techel had gone downtown voluntarily, but now his interview had dragged on his father grew concerned, so he called in a lawyer, who said he and we had called the sheriff's office and said, "we have a lawyer waiting to go see seth." >> reporter: but inside the sheriff's interview room seth kept talking away.us to the fact that the interrogator confronting him was getting real time bulletins from the crime scene. >> i got a text.t was from a fellow agent at the scene who had spoken to seth's best friend, the guy with the puppy. >> reporter: and this person hadry about a girl named rachel. but agent thomas held his fire at this point, in part because his information was still limited.wever, likely could see the agent reading a text. the husband -- father-to-be, who

the question about an affair, dmission, perhaps a preemptive strike. >> there was a female from work that i was texting. >> reporter: he said her name , but seth immediately downplayed her importance. he said even lisa knew about her. >> but i wasn't seeing her, it it was just, "hey, how was your day type of thing." >> would it be considered sexting? >> no, no. >> what are you wearing? >> no, there wasn't any of that. lisa found out. everything was kosher.stopped talking, you know, we got over it. >> we have to be honest about her, okay? is there anything that you haven't told us yet?is going to add up the way i just told you. >> rachel's dna won't be maybe >> i never had sexual -- sex with her. that.

kissed her.ter: by now, seth's father and attorney had arrived and were trying desperately to end the interview. but it was after-hours, and the as locked. >> bang, bang, bang on the door, doug. is that you? >> that's me. that's me. >> they wouldn't stop. >> they --out. >> didn't stop. >> reporter: they didn't have to. remember, seth was advised by agent thomas that he was free to leave any time.. lead agent birmingham, watching seth on a monitor, simply ignored the commotion outside. >> i did get information that get in. and wanting to come in and tell seth to stop. >> reporter: which would shut you guys right down. >> seth is an adult. on to invoke his right to remain silent or his right to an attorney. and no one stopped him from doin' that.as kept asking questions, and seth kept answering them. >> have you ever lied to lisa about rachel? >> no.d out and that was, that was that. >> reporter: meanwhile, both dci

now learned more complete he scene from seth's best friend, the guy with the puppy. the friend, colton, had d that seth was using his special tracphone as a steamy hotline. >> i know they were exchanging photos. >> reporter: did he tell you, "she sent me some topless pictures?" >> yes. see them? >> yes. >> reporter: armed with this information, agent thomas decided to show his cards and see what happened. >> we've talked to colton. ou texting rachel? >> mm-hmm. >> did you tell him about it? >> yeah. >> this is an ongoing investigation, and it's up to st. >> there's obviously more to this rachel thing. she was under the impression leaving. >> when? >> last night, today. >> reporter: he said he'd talked to rachel about him divorcing lisa as recently as the night >> she just asked if i was going to go through with it and i said, "yeah." i mean, i shouldn't have lied, obviously.

said he really was just stringing her along. >> we were having a baby. i wasn't going to leave her. i couldn't leave.o rachel was wrong, he said. but he claimed that lying earlier in the interview was a eving father-in-law, todd caldwell, the embarrassment. >> this is something i didn't want todd to find out.he interview had been going on close to four hours now, and agent birmingham was well aware that seth's father and a lawyer wanted to agent thomas then took a break, leaving seth inside the room to stew. he met with birmingham, and theyo go nuclear. >> reporter: be confrontational, because the clock is ticking. >> and if we're ever gonna be tough, now is the time. >> now is the time.okay? the facts right now, these case facts, show us you're responsible for killing your wife. >> no, no. i'm not, no. i can't kill my wife.

what facts do you have that i okay? i know what guys see when theysee the same thing. okay? >> i'm telling you, if i wanted l i would get a divorce. i would not kill my wife over something that small. right now i guess i don't give i know what happened, i know what you're trying to do. >> what am i trying to do? >> you're trying to get me upset and it's working. congratulations. reporter: upset at this hostile line of questioning, seth said he'd had enough. got thomas's hand. >> appreciate it. >> reporter: and then he walked out. in the end, what did the investigators have? that seth lied about sex, but was it even that?d to was making out with rachel.

insisted, over and over again, t kill lisa. even agent thomas expressed disappointment with the outcome of the marathon interview, ive hours long. you felt you'd come out of a 15-round fight? >> it was exhausting. felt somewhat like a failure, in some regards. >> reporter: why? full confession. >> reporter: maybe that's do it. agent thomas just didn't know. but the women in the caldwell family, without knowing any of seth's admissions about rachel, believed with 100% certainty not kill lisa. especially lisa's sister and seth's great friend, presley. thinking that seth did it. >> reporter: only todd caldwell was no longer a true believer.ioned why seth needed to lawyer up. his own investigative instincts also kicked in, though he'd asked his fellow deputies not to tell him anything until they make an arrest.

investigation, they weren't even close. >> i would say, at 10:00 on 26th, that neither seth nor brian tate were completely eliminated as suspects. >> reporter: at that time, investigators were meeting at department command center to take stock. they knew they had a husband with a possible girlfriend and a maybe crazy neighbor with a vendetta.learned by that night there was a missing shotgun.l mean? one piece of the puzzle falls into place. in the case. >> it was. >> and another round of heart

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>> reporter: it was sunday, the th. but it wasn't a day of rest for the techels and caldwells. they had to discuss arrangements. park. seth was there, but under instructions from his lawyer not to speak about the case.tional moment with lisa's sisters and her mother, tracy. >> the first thing -- seth grabbed the girls and hugged the girls and said, "they think i we all hugged seth, you know, told him we loved him. >> reporter: when investigators

to retrieve some of lisa's things. >> it was very tough.he way it looked. >> reporter: crime scene techs have been all over it, hadn't they? >> all over it. i guess i went into dad mode and tried to protect seth a little bit. p the bed. >> reporter: what was your thinkin' there? >> i just didn't want him to see the blood. >> reporter: how was your boy e hours after? >> i think he was just shocked.nday wasn't a day of rest for the men and women trying to solve the crime either. investigators were focusing on nd were working a lead on a 12-gauge mossberg shotgun. it belonged to seth's friend, lucas howell, who'd been rooming with seth and lisa and had just moved out.d lucas this photograph taken of seth at his home. if you look in the upper right-hand corner, lucas, it's the gun rack.mossberg in that rack? >> yes, it's the middle one. >> reporter: lucas talked to deputies about the gun on the day of the murder. >> i told 'em that i hadn't took

there.ut his 12-gauge wasn't there when crime scene techs scoured the trailer. and cops knew another place it t of guns kept at the house that seth had written out for the dci agent. investigators felt certain the kill lisa, but a big question remained. >> where is it? that's what we wanna know. where is the gun?ter: that same sunday morning, a team began searching the big, beautiful piece of property where seth and lisa were starting married life and family. deputy marty wonderlin, working his first-ever homicide case, was back at the scene.is sunday morning search, over here by this big old tree, what do you hear? >> i hear, "we've gogun here." they were goin' nuts. >> reporter: there was the mossberg in the tall grass, the back door of the trailer. boy, that was a huge development in that case. >> it was. i think everyone's, you know, mood doubled or tripled when >> reporter: ballistics would

the slug that killed the pregnant lisa.uld fill in one big box on their checklist -- murder weapon. next, they worked on possible motives -- was it a neighbor with a vendetta or a husband another woman? state agent birmingham and deputy phillips decided to have work friend, rachel. >> we interviewed her on tuesday, may 29th. >> there's no tricks here, someone has lost their life. actually two people have lost their life.e course of two hours, birmingham and phillips peeled back the layers of rachel's relationship with seth.aving, you know, kind of an ongoing relationship. there are sexually explicit text messages. there are pictures, sexually explicit pictures, sent back and forth.e, but it never led into anything else. he just used to tell me i love you. that's about it. >> reporter: it sounds like they having sex. >> yeah, yes.

>> he always used to tell me how pretty i was and how he'd like but i always made it clear that he is married and has a wife, and he's having a baby, and i . >> reporter: rachel told the investigators the seth she knew couldn't be a murderer. >> would it surprise you if he did this? >> honestly? >> reporter: but seth was a suspect, and if he did fire that shotgun blast, that would place rachel at the heart of a triangle. >> i think that's why i feel so guilty, because i don't want it to be because of me.t day, deputies phillips and wonderlin were back at the neighbor brian tate's house.erlin and myself deputy phillips are pulling up here at the tate residence to re-interview mr. tate.me, they asked him point blank about the murder of his neighbor. >> we're just trying to figure this all out, you know. did you have anything to do with lisa's death?t.

alibi: home and asleep, after taking his medication. lead agent birmingham thought he was telling the truth and tate off his suspect list. so you only had one suspect at this point. >> yeah, one suspect and only one suspect.hat evening, lisa's loved ones gathered at a funeral home for the visitation. the turnout was impressive and included many of todd's friends 's department. your fellow officers are there as they would be, you know, they-- you know, want to show respect. >> right.d inside was somber and uneasy. the caldwells gathered near lisa's coffin. the of the room. seth was there. his sister-in-law presley will never forget what happened next. >> he actually came up to me, e of it, he gave me a big ol' hug, and he said, "you will always be my love you." and i was like, "i love you back." >> reporter: when the last

families remained, still at nds of the room. >> then i saw the two dci agents come in and sit down behind me, a couple rows behind seth and i. a personal visit or professional --" >> reporter: is this condolences or somethin' else, huh? >> yeah, and he said, "it's professional." >> reporter: marty wonderlin was there. you know, come outside. and we did it quietly, i thought. >> reporter: and when they were erlin carried out his orders, he arrested his friend seth techel. a fellow deputy put the cuffs on him.'s cuffs, the ones she'd used as a reserve deputy. so this has gotta be just more than your brain can absorb. yeah. >> reporter: little sister, "i'll always love you," and now, he's going downtown, he's about to be charged. >> yep.erstand it. we wouldn't ever dream or ever understand that it could be him. >> reporter: seth's dream was tor as a

cuffed, riding in the back seat, and about to be charged with the murder of his wife. seth techel goes on trial.tarts, the prosecution suffers a major blow. for them. >> then a clue changes everything. >> i believe it to be the most

>> reporter: for lisa techel's family, it had been a heartbreaking, relentless week. thursday didn't promise to be . lisa's funeral was held at the first lutheran church in ottumwa. seven months earlier, todd caldwell was at the very same his daughter down the aisle on her wedding day. now, he'd return to lay her to rest.er jailer's uniform. a special detail of officers served as pallbearers. law enforcement had come out to . >> lisa woulda thought, you know, "this is all for me? i was so proud. >> i should've been able to be there and -- and watch her she was just a joy. >> reporter: mothers shouldn't bury daughters? >> never. never.

the caldwell and techel families turned their attention to the upcoming murder trial of seth techel.d to plot strategy, with the neighbor, brian tate, expected to be right in the thick of it. tate's sister cheri says he never could shake the feelines would come after him. saying he's a murderer. brian had even seen in the paperallin' him a crazy and deranged neighbor. it just devastated him. >> reporter: that summer, brian tate tumbled into a downward nd never recovered. he died in september 2012, just four months after lisa's murder. the coroner would think it was heart. >> yes.the family think it was? >> we think it was heart. a broken heart. >> reporter: and now prosecutors - from the state's attorney general's office -- worried that a jury might think the deranged, deceased, neighbor did it.to call tate as a witness.

you know is always better than we wanted the jury to see mr. tate. >> reporter: but now with a trial date approaching, prosecutors had lost a key witness. good for them. it's great for them. >> reporter: the long-awaited murder trial of seth techel was in hometown ottumwa.y, gentlemen? >> reporter: february 2013, can you see yourself going into the courthouse?ember. >> reporter: what do you say to one another? >> we gotta stay strong. >> reporter: the caldwells never wanted to besa. but, heading into trial, they were all now convinced that he did, even presley, once his porter. >> there's really no other explanation for what has happened. >> when you left the techel residence, who was there?minent families, the caldwells and techels, once close in- laws, were now fiercely divided, camped on opposite sides of the

>> i was like, "just look at me, like, i wanna see kind of in your eyes, how you're doing," oesn't look at you. >> she was like my best friend. >> reporter: prosecutors called to the stand their emotional trump card.ered his lisa. >> everyone would tell me how much lisa and i are alike, and ist tell everybody that she's the best parts of me. >> reporter: the prosecution hadproving the charges, first degree murder and nonconsensual termination of a pregnancy. strongest fact was going forward, strongest part of your story for a jury?e most important single piece of evidence was the shotgun. >> reporter: ballistics showed this mossberg 12-gauge was the n, a firearm that seth kept inside his house, and only he had access to it that

lisa techel comes to the murder scene without the murder weapon. >> we argued the impossibility of his story. some unknown assailant breaks and kills the wife that he says he's gonna leave. >> tyler batterson is our next witness. >> reporter: prosecutors called friends to show the jury, they said, just how deceptive and manipulative seth was. this witness was one of the behind all the vandalism across the fence. he testified he was just following seth's orders.to go mess with his neighbor tate. >> reporter: how were you gonna mess with him? >> fill five gallon buckets fulland go dump 'em on his property. >> reporter: remember, seth had assured his father-in-law -- and the state agent who interviewed ct opposite. >> and i said, "i'm not messing with him. i'll make sure nobody else is." >> reporter: looking back, that incident was what turned todd tate in the first place, fixing the idea in his

a deranged, maybe dangerous crank.y what seth had told me about him. >> reporter: as for tate's complaint-calls with deputies, as captured on dashcam video, it became evidence for the prosecution.ed the squirrels, birds and deer. >> we were hopeful that the jury would see brian tate as we saw him.ter: and they saw him as an eccentric, but harmless man. certainly not a killer. then, at last, it was time for the state's star witness, rachel mcfarland -- n -- to show up and tell her story. her? >> we needed the jury to believe her. >> reporter: rachel testified with seth started heating up in december, 2011, which was two months after seth got married. >> it became more sexual, askingres. or, i don't know just showing

seth and rachel met at a nature together. >> i mean he kissed me, touched me. he said that we had everything in common and that he had tried out with lisa and things weren't working and i was exactly what he wanted. >> reporter: she said seth he was going >> did he say he loved you? >> yes. >> reporter: but rachel was hedging her bets.s also interested in a co-worker named brandon, who just happened to call her during her tryst with seth in the park. >> he just started getting . >> and so on the 20th when he learned that you were communicating with brandon, he said what? >> just give me two more weeks. >> did you ask him what he meantwo more weeks? >> yes, and he just repeated the same statement. >> reporter: six days later, lisa was murdered in her own bed. have a motive that we can understand. love. the whole relationship with

techel's death. >> reporter: but defense attorney steve gardner ive of an affair falls flat without the essential element -- sex. >> seth techel was being accusedis wife for an affair that he was hopin' to someday have. >> you never had intercourse with him. r had oral sex with him. >> no. >> never had your clothes off. and you kissed a few times. >> yes. >> is that a fair assessment of ur romantic relationship with mr. techel. >> yes. >> reporter: the defense also didn't accept the state's take armless eccentric. >> the most compelling evidence as to how this occurred involved the neighbor, mr. tate.ill. >> i'm done talking to you. >> reporter: and, according to the defense, dangerous, too. the defense then hammered home

todd's own complaint summary from that day. you're in the awkward situation of being their best witness. >> right.d he could become a danger. anyone who should t residence again should use extreme caution. >> that is correct, i did. >> reporter: the defense theorized that tate entered the nlocked door and shot lisa for revenge. the key defense evidence that suggested an intruder was a and-jelly sandwich, in a baggie, left on the back deck. >> there was a sandwich that would not have been there the hat was there. >> reporter: critters should have devoured it, he argued. he told the jury it must have been the killer's snack.e the most compelling piece of evidence in the whole case. >> reporter: it was now up to a

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>> reporter: back in the jurors in the seth techel murder

stay out and they stay out. what are the prosecutors telling hat there are some that are guilty and there's some that are not guilty, and they're just not agreein'. and i'm starting to get worried at that point. >> reporter: micah sheheen was on the jury. juror in particular was responsible for the stalemate. >> he started pounding on the door saying that he wanted out of there.. a lot of us because we knew that we were up against a wall, that nothing else could be done with this person.stimony and three full days of deliberations, the seth techel to a sudden conclusion today. >> reporter: it was all over. >> the motion for a mistrial is granted. >> reporter: the judge declared jury. hung jury? you ever have one? >> well, i never had one in immediately decided to retry the case. the vote had been ten to two for conviction. >> of course we're disappointed in what happened.he caldwells had

closure they desperately wanted. and they'd have to do it all over again.o know that you're gonna have to endure another one. >> reporter: a trial date was later, october 2013. and trial number two would be heard in a new courthouse. there'd been a change of venue mt. pleasant. making it even tougher on the caldwells, the daily treks to court, lives disrupted.oom had a distinctive layout that put the caldwell family directly behind the defendant. >> he's literally sitting right like you are. >> reporter: which only made it more frustrating for presley who was still trying for any kind of connection to someone she once . >> i'm just staring at him, like, "just glance at me, do something," and he doesn't.n more painful for the family was having to sit through --

photos of their lisa, and the unborn baby girl.han the change of venue, seth techel's second murder trial played out as a carbon copy of the first. arguments. a replay of two opposing "other suspect," versus seth techel, the husband with the "other woman." rachel mcfarland was, again, thestar witness. sent you a message with a picture of his, his own smiling miss you bella."m. >> is that a term of endearment that he called you, his bella. >> yes, yes. >> you sent him a picture of you in either a bikini or your bra and underwear. is that right? >> yes.

me luck. 10:51 p.m. on may what was he asking you to wish him well with? >> i believe that he was going to tell her that he wanted a divorce. >> reporter: two days later, lisa was dead.ly had hardened opinions about rachel. >> i don't think too highly of her. i felt like she destroyed my d her life. >> reporter: todd, rachel, huh? >> actually, i'm, i'm maybe not the most popular view.r what part she had to play with seth but i think she's kinda been a victim as well. >> he's manic, he's up all the me. >> reporter: the defense offered before. >> the defense went even harder at brian tate than they had the first time around. >> he could quickly become and agitated. >> reporter: this time, the defense, over strenuous prosecution objections, got tate's psychiatrist to testify. near the end of his life in a hospital mental

you find him to be paranoid, paranoid delusional? >> and was there a general topic of delusion of which he was paranoid? >> he seemed to make reference that there were some acies affecting him. >> reporter: after three-weeks of trial, a second jury had seth hands. and that's when things got deja vu all over again. the judge read a note from the foreman. not going to reach a verdict. what's next? >> reporter todd, it's happening again. >> yep. and i'm thinking, "this is two and we're right back to the beginning." >> reporter: but the judge wasn't ready to give up. he told the jurors to keep emotions in the open courtroom were raw, especially on the caldwell side. the jury couldn't help but hear it. i were crying. we weren't crying uncontrollably or anything. but you could hear us sniffling a little. >> reporter: as the jury filed steve gardner rose, to scold the spectators.

he said, or he'd demand a mistrial in fairness to his client.sire this jury to >> reporter: now, it was the prosecutors turn to seethe. >> the defense is making this speech about the caldwell familyfluence the jury, which we thought was ludicrous, i squeezed andy's arm, and i said "i'll take this."and suggest that anyone in the courtroom is trying or attempting to intentionally influence the jurynsense. >> reporter: the courtroom started to settle down and t seth remained at the defense table, his former father-in-law coiled behind him, ready to pounce.praying, "please just let me stand here. >> reporter: for more than a minute, glaring, burning a hole in seth's back. if looks could kill. >> there's just kind of an urge to move forward. ail? >> yeah. god, please don't make me do

>> reporter: what were you doin' in your mind? >> i don't really wanna even think of what i was doin' in my -- i was wantin' to do somethin'. >> reporter: two hours later, the jurors returned. but nothing had changed.lared. >> reporter: unbelievable. veteran prosecutors who'd never had a hung jury before, were now o for 2.te didn't hesitate. seth techel would go on trial for a third time. >> our intent is to retrsy decision to make. >> reporter: even though the jury's vote was again in favor of conviction, this time nine tos family was starting to have its doubts. >> is there something that i'm just overlooking? like did he not do it?hat they just see and they're like -- he's not guilty? >> reporter: but just when they t suffer any more heartbreak, the caldwells would be devastated by new findings by a brand new defense team. ek

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>> reporter: two families. two trials. and so far, no winners. three promised to be different, starting with a >> the previous trials were not ously close to being convicted in each of them. >> reporter: state-appointed defense lawyers roger owens and jake feuerhelm knew that, in two24 jurors had voted to convict seth techel. they didn't like those numbers, and decided to head in a >> we chose to focus on the sloppy work done by the law ent. there was absolutely no dna, fingerprint -- confession. >> reporter: feuerhelm would argue it was a botched investigation.e scene techs do tests to match the slug to the

it for fingerprints or dna that shooter? >> did you test the bullet that was in the chamber that killed this woman? no, we forgot, or we didn't do it. >> whoops. >> reporter: the new defense team had a new story to tell -- it was all a rush to judgment tod been in jail ever since his arrest two years earlier. and there was another big strategic shift. they would soften the focus on of the first two trials -- brian tate. >> our conclusion was after listenin. tate, that he wasn't the deranged person that they tried to portray him as being. >> the way he was speaking to law enforcement that afternoon like the person that would have walked into a trailer home at 5:00 in the morning and murdered his neighbor. >> reporter: the defense attorneys made a tactical decision.gs of tate didn't make him look like a dangerous killer, they would not show

and they'd roll the dice, hopinge prosecutors wouldn't either. >> the caldwells and techels had been put through the wringer foryears, their once close relationship had frayed. and now the third trial was pushing everyone to the brink. it was an impossible situati caldwell and doug techel managed to find a moment of grace. >> i went over to him and i just said, "doug, i want you to know a great guy. i think you're a good person." >> reporter: did you really? >> "no matter how this turns out, i just want you to know that."k the same thing with you, todd." and i went to shake his hand andd we both just hugged. >> reporter: the two fathers then returned to opposite sides july 2014, for the third time, the state of iowa versus seth techel. >> counsel, you ready for the jury? >> reporter: this time in rs from the first courthouse in ottumwa. again argued that seth's story defied logic.

victim of one of the largest coincidences ever known. and that is he told his girlfriend that he left his wife.d a little less than 17 hours breaks into his house and kills the wife that he is -- says he's gonna leave. >> with a weapon which he hasn't >> correct. with a weapon which he hasn't brought with him. >> i had a mossberg model 500 shotgun. >> a 12 gauge. >> yes. >> reporter: and seth, prosecutors said, had easy weapon, the shotgun that his friend lucas kept in seth's house.uge mossberg shotgun that you left behind in the techel residence when you moved out in may of 2012? >> yes. >> reporter: and, the prosecutors argued, only seth they said seth and rachel's steamy texts and cell phone photos played like a countdown to murder by seth.on the 24th, you ask him, do you really want to be with me? and he responds, "forever." >> right, yes.hat's may 24th,

and in a follow-up text, rachel asked seth if he'd told his wifeyet. >> and he responds, "well, we talked.asn't happy, she got mad then sad, then i slept on the couch, so hello, >> correct. >> reporter: rachel told the jury that she and co-workers nicknamed seth "mr. resuscitator" because he firefighter who often bragged about his life-saving cpr heroics. >> so he was going to be mr. resuscitator and you were r. >> yeah. >> reporter: then to drive home thei murder over divorce, prosecutors called a co-worker who'd been a confidante of seth's.essed he just needed to either end his marriage or end it with rachel. >> and in saying that he should end his marriage with lisa y comment

>> he asked me if i wanted to pay his child support.n the witness recalled another remark seth made about lisa. >> he stated that it would be better off if she was in a car wreck and died.tors hoped their third time would be the charm. but, the new defense attorneys would come at them with everything they had and that explosive new evidence. this time, it was about lisa.

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>> reporter: from the day lisa techel was murdered, brian tate >> go get him. get him. now.d been exploited by seth's defense ever since. >> the question that you will ether or not the state has proven that seth techel did it. >> reporter: new defense attorneys roger owens and jake letely different strategy.

rachel, offered as seth's motiver trials, was also minimized this time. >> good afternoon, miss mcfarland. >> hi. >> reporter: in achel was on the stand for a scant seven minutes. tick tock, there's the message on thursday.tator, blue skies ahead. we're a couple. what do you do with something like that? >> i tried to be as straightforward as i could with the jury.he world is going to murder their wife to facilitate a relationship that hasn't even you're not having any sex with this man right? >> correct. >> and the only time you'd actually seen him in person, in your whole entire life, outside our or five times. >> correct. >> i have no further questions. >> what we wanted the jury to think about her is that you're e for this? >> reporter: attorneys feuerhelm and owens then went on the attack, characterizing the work woefully shoddy. >> the ayes have them --

incomplete. defense thrust was on what the investigators did not do. this state criminalist had to admit they did not test for e on seth techel. >> how many times do you think you testified in criminal trials that gunshot residue was evidence of a crime? a lot. >> but in this case, no, we can't argue it because we don't have it. >> yeah exactly, we'll never know. >> reporter: and the defense said it was even more shocking that this state expert had to make a similar admission about gun shell. >> this is the shell that killed lisa techel. >> yes. >> the very shell that killed xamined by the state. they just said, "we -- we forgot to do it." centerpiece of the defense case against the cops was something else they didn't do. they'd been so busy

years before, that they never really paid attention to lisa. the new defense team would ing with her cell phone and the secrets it held. you found out the story told by the phone? that there was this guy -- co-worker? >> right.ter: it was a bombshell. lisa was having an affair with a fellow jailer.r was a married man, a father of four. >> reporter: and this is not making out in the back of the car? >> no. he thought he could even be the father of her -- of the child. he thought that. led lisa's lover, jason tinnes, to the stand. >> back in may 2012, did you know lisa techel? >> yes i did.on testified that the affair started before lisa married seth and ended just weeks before her murder.at some point did your relationship with lisa techel become sexual? >> yes, it did. >> now when we talk about a sexual relationship we're not g, are we? >> no, sir. >> we're talking about actual

>> yes, sir. >> reporter: for lisa's father, that his daughter had a lover was the cruelest blow yet. >> the first emotion i had is, "why? why, lisa?" and my second thought is, "i don't wanna tell amy 'cause i know she's not gonna be happy." >> reporter: dmory at all? >> really, what it did for me more than anything is, i have so many more questions that i'll ask her. i mean, i love lisa and she was a human being and she made mistakes. >> reporter: the graphic 's affair, and how police overlooked it, fit perfectly with the defense's theme of a botched investigation and a rush to judgment against >> here's a legitimate suspect that should have been investigated. >> reporter: investigators never spoke to jason while they were building their case against seth.s finally contacted

trial started.tween may of 2012 and sometime in june of 2014, no one to anyone about this at all. >> no, sir. >> reporter: but prosecutors fought back.d an alibi witness -- his wife. they called her to the stand. >> do you have any memory miss hereabouts of your husband on may 26, 2012 at approximately 5:00 a.m.? >> he was sleeping with me at >> reporter: and dna testing on jason, done right before trial, also proved he was not the father of lisa's baby.l believed that raising the story of lisa's affair, and how police never uncovered it, would give jurors the entire investigation. 'cause this is the big part of your case in trial three. jurors, you're seein' some police work here in terms of investigation? >> it fell right into our theme, to our theory of the case.

sides, took half the time the others did. that was another part of the newed strategy. there'd already been five holdout jurors in the previous two trials. now todd caldwell worried that had produced a cloud of even more reasonable doubt. >> you kinda think, "okay. if i was on this side, that's kinda how i woulda handled it." "t job." and i'm convinced it's gonna be another hung jury.y wouldn't it be? todd and just about everyone else is in for a surprise. >> has this jury reached a verdict? delsym lasts three times longer than the leading cough liquid. y or all night relief, try delsym -the #1 doctor

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y 24, 2014. were different. as seth techel walked into the courtroom and sat down, his face showed no expression, no hint ofce in any direction. not at his family, and certainly not at todd, his former father- in-law.y you used to clap on the back and say, "i love you." >> yep. "just take care of her. that's all i ask." >> reporter: but todd was at seth, hoping to find something, anything. now, the moment was at hand. >> has this jury reached a verdict? >> it has.he judge asked the court attendant to read the verdict. lisa's mother could barely contain her emotions.

nerves.- we the jury find the defendant seth andrew techelthe first degree. signed by the head juror.senual termination of human pregnancy, guilty. >> reporter: the justice system a and unborn zoey. and then you hear the words? what do you see?guilty. and i see nothin', not one single emotion from his face. >> reporter: the jurors had ur hours to convict. on their way out, several reached across to shake tracy's hand.esley still had one big question.sk him why. there's seth before may 26, and

on, and it's almost like i don'tow who that is. >> reporter: seth's parents tried to fight back tears.reaking. >> reporter: on the caldwell side, tears of joy and displays of overwhelming relief. hugs, more than two years of pent-up emotions finally coming out. the caldwells then walked across the aisle.mbraced, united in we know this family. i know it's not doug and 's not their family's fault that any of this happened. todd searched out doug. only three years before, they rating their kids' wedding together. doug and lorraine still support their son and say he didn't do what he's now convicted of either of you? >> no, sir.

>> everybody's a loser. nobody wins. but i will say this. i think lisa knows somewhere system that she wanted to be a part of worked. >> reporter: the caldwells and techels weren't the only ones with a stake in the verdict.cheri had been waiting for this moment, too. >> i started cryin'. t was tears of joy. they had finally gotten this s.o.b. in prison. >> reporter: todd still carries the burden of helping to pin the blame on tate in those awful moments after lisa's murder. tell the family how sorry i am that they had to go through what they had to. we're gonna have last word on brian tate.ocent guy that was made a victim by seth. >> all rise. >> reporter: a sentencing hearing was held in september 2014.wells were given a

talked directly to seth. >> you know how close lisa and i was.hat you took from me. out of everybody in this room, you know.resley, lisa's sister, walked up to take her turn. during all three trials, she'd desperately tried to make eye act with seth. >> seth was my best friend, my brother, who i loved so much. >> reporter: now, she finally as she spoke, she looked straight at him. and, for the first time, seth stared right back at her.e you with one final thought, that i'm no longer your sister, and i no longer love you.nd then the judge

life in prison, with no ssibility of parole. when it was finally all over, todd went to the cemetery for a private moment with his oldest daughter.t there and i just told her that we did it and she could be proud of everybody. >> reporter: todd's been back many times since.s a special, deeply personal place for him. he designed her headstone. in it, todd? >> the first thing i would do when i started like sketching it is, i would just draw a heart out. for some reason in my head, it pe of a heart.ould put in there is a mother holdin' a baby. and lisa and i had this thing that we would say to each other. we texted to each other and everything. it's from, "the notebook," movie and it's -- we've always said, d." you know, i mean, whatev -- whew.

so in the hair of this, i made two birds in there, by the time