>> what kind a dad are you going to be? >> i'm going to be the opposite of my father. i'm going to be there when my kids need me. >> and that's the beauty of the american dream. there's always a new beginning no matter where you came from. i would tell her how much i miss her and that i love her and that she's the reason why i'm who i am today. i would tell her thank you. >> lauren giddings, law school grad with the world at her feet. fiercely intelligent. >> and fierce with her opinion. >> she made friends wherever she

went. >> so it was strange when she dropped out of sight. >> didn't take her car, didn't take her purse. we realized there was something wrong. >> they couldn't possibly have guessed how wrong. >> there's another level of evil here. the person who did this was trying to create a vanishing. >> who could do such a thing? >> first thing you look at, who's closest to her romantically or geographically. >> the list was long. a boyfriend, an ex, fellow students. had somebody been studying more than textbooks? >> he would ask other people, how would you commit the perfect murder? >> his roommate said he always thought he was smarter than everybody else, smarter than law enforcement. >> smart, maybe. but had he slipped up? >> what they found told us everything we needed to know. >> a confounding case that would come down to a damning piece of video that no one was supposed to see. >> sick, twisted. >> what was it like to see that? >> i knew we had him.

>> it was a summer morning in the heart of georgia. heat rose thick and damp among macon's grand old antebellum mansions. as the sweaty morning traffic crawled by. something in the air that morning. something off. maybe just the trash truck. >> this was a 90-degree day toward the end of june. there was a hot wind blowing that day. >> joe kovac was down at the local paper, crime reporter there. and all of a sudden -- >> i can remember the buzz in the newsroom. >> oh, this would be big. big and disturbing, like sometimes things can be in the south, said joe. >> it was a shock, a shock to the system, yeah. ♪ >> but there's something else

about the south, something sweet, magnetic. it draws people in. and macon, with its storied history and its cherry blossoms, is its very heart. >> it's slow, relaxing. everyone here is welcoming. >> even for a new yorker named ashley mueller, who signed up at the mercer law school here. >> you never meet a stranger, i guess, in the south. that's what makes it so wonderful and comforting. >> it's where she met lauren giddings. >> when we found out we both were from the north, we just instantly connected on that. >> but then why wouldn't she want to connect with lauren? she was bigger than life. >> she was infectious. i mean you couldn't be around her for more than five minutes and not already be having a good time. >> she was the adored eldest of three sisters. youngest, sarah. >> we would always go on runs

together. >> caitlyn in the middle. >> she was more like a bookworm. she loved to read, academics. >> lauren grew up in maryland, halfway between baltimore and d.c., with her friend katie o'hare. >> we knew each other inside out. i'd always know she could cheer me up. she was a funny girl. she was a riot. >> how would she make you laugh? >> the things that would come out of her mouth sometimes didn't have a filter. >> why did she go south to go to school? >> she loved the south. she was a country girl at heart, and when she got there, she loved it. she didn't want to come back up here. >> and lauren certainly knew what she wanted. wanted to be a lawyer, but not one of those corporate types or even a crusading prosecutor. lauren wanted to be a public defender, a voice for the poor and the accused. why did she want to do that? >> she always wanted to help people. always. >> and mercer law school, perched on its hillside in one of macon's sweet spots seemed

right for her. >> she was a fan of nancy grace. nancy grace graduated from there. >> oh, well. lauren found a great apartment across from the school. even the maintenance man was a student. soon she was everywhere, running in the park, active in her church. eventually president of her law school's federalist society. she was hard to miss. >> she showed up in her pink outfit. >> always pink? >> always pink or even seersucker. >> and always with her dog, butter bean. >> fluffy, blonde haired just like she was. >> and she carried it around all the time? >> always. she basically was elle woods in "legally blonde," so we always kind of jibed her for that. >> it was no surprise she attracted a lot of men. >> she always had people kind of infatuated with her.

that's how she was. >> like david. she interned at his law firm in atlanta. he was 20 years older, but their relationship seemed pretty serious, until apparently it wasn't. >> they met the year before she went to law school and then dated for a long time. they had broken up at some point and gotten back together. >> going through that do we do this, do we not do this? it's a complicated time. >> yeah, i think, you know, being in school is hard, and they weren't living in the same city or anything. >> and besides -- >> lauren was a flirt. i mean she liked attention. >> and she got it from a classmate named joe. >> he was more like goofier side and, you know, her age. >> so they became an item. but there was something about david, some chemistry that drew her back. and she gave joe the bad news. >> lauren was upfront and told joe, and that was that.

>> a little bit brokenhearted on joe's part? >> i think so. i think so. he really liked her. who wouldn't? >> anyway, at graduation time, may 2011, david was there to cheer her on. it was a big event for the whole family. >> we went out after her graduation with her friends and got to know everybody. >> and just a month later, another celebration up north. her sister's wedding. >> i did want to say how special this wedding is. >> lauren was maid of honor. then back to macon for the final hurdle, the bar exam. a busy and scary time for a young lawyer-to-be. >> absolutely. >> but first -- >> it was everybody's kind of last hurrah. >> it was friday night, end of june 2011. the graduates gathered at a local bar for one last blowout before hunkering down to study. they closed the bar, went to

ashley's boyfriend's place. lauren's ex, joe, was his roommate. >> eventually we all kind of decide we're going to go to sleep now. mind you, there was alcohol involved, so -- >> surprise, surprise. >> right. >> lauren stayed the night in joe's room. and the next day, everybody was moving a bit slowly. >> i did not see lauren that morning. i didn't see joe that morning either. we just kind of assumed they were in the room together. >> and then it was time to buckle down. all of the friends, joe included, went off to cram. >> really you kind of just go into this hole and study constantly and don't really have any contact with anybody. everyone was kind of in their own world trying to get ready for this -- this test that you worked so hard for. so it's a lot of pressure. you just -- you become a hermit. >> so it took a few days to realize no one had heard from lauren. coming up, no reason yet to

assume anything was wrong, but soon there would be. >> i immediately was like, this isn't right. so i called her sister, caitlyn, and i said, lauren's phone off. she hasn't been answering me for days. >> alarm bells for one friend while another steeled herself to enter lauren's apartment. >> i said, are you ready for whatever we're going to see when we walk in there? >> when "the watcher" continues. e you empty as little as once a month. e and unlike standard robots that bounce around it cleans row by row. if it's not a shark, it's just a robot.

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hmm. [ laughing ] that works. it was photos from that wedding trip up north that set off the alarm. the selfies katie o'hare snapped and then nine days later texted to her friend down in macon, lauren giddings. >> they were kind of like funny, so i know she's going to respond to me and be like, oh, my gosh, if you post that online -- >> yeah. >> -- i'm going to get you. >> but no response. was she studying too hard to

look at a few photos? katie tried again the next day and the day after that and again no response. >> that's not normal for her and i. >> sure. >> we would talk a lot. >> katie called lauren's cell phone. >> and her phone was off, and i immediately was like, this isn't right. so i called her sister, caitlyn, and i said, lauren's phone's off. she hasn't been answering me for days. have you heard from her? >> no, she had not. so caitlyn reached out to lauren's law school friend, ashley. >> her sister contacted me over a message on facebook. >> hey, like trying to get in touch with lauren. have you seen her? can you let her know we're trying to get in touch with her? we haven't heard from her. >> this was wednesday, and now thinking back, ashley hadn't seen lauren since that pre-study party friday night. ashley went to lauren's apartment. her car was there. she knocked at the door. >> when she didn't answer, i

didn't think anything of it. i assumed she was running. i assumed she was studying somewhere. >> so she let it go. but then a few hours later -- >> her sister contacted me again, and said, hey, this is an emergency. we've been trying to call her, and she still is not answering. >> now ashley began to worry. so she and her boyfriend returned to lauren's place and used a spare key to go inside. first she warned her boyfriend. >> i said, are you ready for whatever we're going to see when we walk in there? because you just have this almost sort of dread. and i will never forget that. i had been interning at the d.a.'s office, so obviously -- >> used to hearing about bad things happening. >> right. her family hadn't had contact with her, we hadn't had contact with her at this point in time, four days. so you never know what you're going to walk into it. >> it was dark by then.

>> we had to walk back pretty far into the apartment to find a light to turn on. searched her bedroom. she's not in there. >> what they did find was quite puzzling. >> her purse, her keys, her slefl, her i.d. all on the couch. her laptop on her bed. >> as if she'd just gone off for a run or something. >> exactly like that. >> but no her. >> no her. and butter bean, her dog, had been at home with her parents at maryland. so the fact that butter bean wasn't there wasn't kiconcernin to us. the fact that she wasn't there hours later, that's when it became real. >> something else occurred to them. lauren was due to move out the next day, june 30th. but -- >> nothing was packed in boxes, but it definitely looked like she was getting her stuff together to be able to pack it. >> she'd already told her friends her plan was to move to her boyfriend david's place in atlanta, an hour and a half up the highway. >> i mean that was supposed to be the plan. that was lauren's plan.

>> even though some of lauren's friends thought they weren't right for each other. >> i don't know if i want to use the word flaky, but her relationship with david was fla flaky. >> lauren's family called david. he said he hadn't talked to her in days. >> i remember specifically him ca hanging up and calling back a few minutes later like, what is going on? >> back at the apartment, ashley rounded up lauren's law school friends, including that ex-boyfriend, joe, with whom she'd spent the night last time any of the friends saw her. >> joe immediately went to the law school to search the law school for her. >> while the other friends took a careful look around the apartment. they found some food wrappers and in her car, a receipt from a zaxby's restaurant drive-through, it was time stamped the evening after that pre-study apartment. now it was wednesday night. >> it was at that point in time four days old. >> so where did she go?

for a run? did she have some sort of accident, or was it something even worse? lauren's friends knew she spent time visiting prisoners when she was an intern at the public defender's office. that would make you wonder about some of the people she encountered. >> she encountered all sorts of people. she would visit the jail often. >> maybe someone took an unhealthy sort of liking to her. then they remembered something lauren said the night of that last pre-study party. >> she had thought someone had been stalking her, but we didn't really pay much attention to it because of who lauren was. >> she was the girl who always had admirers, who stood out. just about everybody who lived in the apartment complex knew lauren, including, of course, her fellow student and next door neighbor, and he wanted to help search for her. he asked about window locks. somebody check her windows to see if they were open or locked? >> i think one might have been unlocked. >> friends also checked lauren's computer and discovered that her

last online activity was an email sent saturday night. this was disturbing. >> it was an email to david. it was eerie. >> what did it say? >> essentially that she thought someone was trying to break into her house. a night prior, i think she referred to the person being a hoodlum, a macon hoodlum. >> the ultimate fear, that some evil stranger had taken their friend, lauren giddings. coming up -- >> we started systematically taking each room and trying to find any evidence that we could. >> investigators search lauren's apartment with a forensic tool that reveals a critical clue hiding in plain sight. >> it was like a light switch. >> when "the watcher" continues. y godmother alice. and long-lasting gain scent beads. part of the irresistible scent collection from gain!

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with whoever i could. i made a facebook event on lauren's facebook, inviting all of her friends to post when the last time they saw her was. >> around 2:00 a.m. thursday, lauren's sister woke up their dad. >> he has 100 questions, and i didn't have an answer to any of them. i didn't know anything, you know. her apartment was empty. her stuff was there. >> unable to sit and wait for answers, lauren's dad packed up his car and started the 11-hour drive to georgia. macon police, now part of the sheriff's department, looked around lauren's apartment the night before, but by morning with still no sign of her, detectives were called in. and with them, crime scene investigator steve gatlin. do crime scene techs go work on missing persons normally? >> not normally, but this was something a little different. this was a person who just graduated from law school that had everything going for her and wouldn't just up and disappear for no reason. >> she was a social animal, and she would -- you know, they

don't just vanish, right? >> exactly. she had friends, family she keeps up with. she had a career that was about to blossom and had all this going on, and to just disappear with no trace of not talking to anyone was unlike her. >> so gatlin looked up at lauren's front door, second floor, left side. nothing seemed amiss. out front, a garbage truck lumbered up. but blocked by the police cars, was unable to empty the complex's trash bins. the truck moved on. by then, lieutenant gatlin was in the apartment looking around. >> it just looked like somebody walked out and shut the door. >> puzzling. the day was hot already. a humid breeze scuttered across the yard. >> when we started coming down the stairs here, that's when the wind kind of hit you in the face, and you could smell something. you could smell a foul odor. >> a recognizable foul odor. >> pretty much. >> that was a smell lieutenant gatlin was all too familiar

with. he followed his nose to one of the trash bins outside the apartment. >> we opened it up, looked in there, and i saw two trash bags. >> he pulled out the bag on top, ripped it open. typical household trash. >> and then i went to the bigger one, which is a large size package. it was a trash bag that as soon as i reached down and touched it and felt it, i felt like it had some human remains in it. >> and then to his growing horror, he realized it was just part of a body, a woman's torso, nothing else. >> we started cordoning everything off with crime scene tape. they even used sheets to put up barriers on the other side of the fence so the news media and the general public couldn't see what we were doing because at that time with this investigation, they didn't need to know yet just in case. we didn't want to mess anything up if it got out too quick what we had found. >> and meanwhile, better take a

closer look at that apartment. >> we started systematically taking each room and trying to find any evidence that we could, using all the techniques and science that was available to us at the time. >> one of those tools was lumin luminol, a spray that turns blue when it comes in contact with blood. lieutenant gatlin sprayed it in lauren's bathroom and -- >> it was like a light switch. the whole bathroom glowed. >> what did you think? >> i was thinking oh crap because the whole tub all the way up to almost two inches from the top had the same glow. >> what did that tell you? >> it told me she was dismembered right there in her own tub. >> that's got to give you the willies a little bit. >> it bothers me right now just talking about it. >> but this was strange. when they dusted for fingerprints and checked for hairs and fibers, they didn't find much at all. >> did somebody wipe everything down? because you would think you would find other people's

fingerprints and things like that. >> this wasn't going to be easy. police had already rounded up lauren's friends and her neighbor didn't want them to know about the discovery. took them all downtown to record their statements. and while they were there -- >> there was a call to our newsroom. >> macon telegraph reporter joe kovac. >> there had been a body found outside an apartment on coleman hill. >> police had tried to keep their discovery quiet but it didn't take long before the news was online. and back in maryland, where lauren's family had gathered -- >> my uncle came in. he asked, you know, have you heard the news? and we're like, no, we haven't -- i mean we're in maryland. tell us what you're talking about. and he said, well, they found a body. and at that point, you know, it was just hysterics. >> we all like ran into different rooms. >> we ran to the computer because it was just like, i need to know what he's even talking

about. where do you find this? what are the details? and once it comes up and it's a body found at her apartment building, you know, that's different than a body being found. it's a body at her apartment building. >> was it her? must be. downtown investigators resorted to method. >> who's closest to her romantically or geographically? >> start close, as they say. close to the victim. but how close? oh, they had no idea. coming up, police look at the men in lauren's life. her boyfriend, david and her ex, joe. they wondered could there have been a love triangle gone wrong? some people react badly to that sort of thing. >> very badly sometimes. >> when "the watcher" continues.

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i'm milissa rehberger. here's what's happening. investigators have identified the person responsible for the christmas morning explosion in

downtown nashville. the u.s. attorney confirmed 63-year-old anthony warner, a longtime resident of antioch, tennessee, was present when the bomb went off and died in the explosion. this conclusion is based on dna and evidence recovered at the scene. investigators are still following leads but believe there was no one else involved in the bombing. warner's motive remains unclear. back to "dateline extra." lauren giddings' father was on the road to macon when he heard the terrible news. it was likely lauren whose body they found. and so he went to police headquarters to meet with now retired chief of police mike burns. >> he wanted to identify his daughter. we told him no. and then he was insistent he wanted to identify his daughter. so i cleared the room, told him that it wasn't chief to father.

it's father to father. he didn't want to identify her. i told him that's not the last way you want to remember your daughter. >> and then chief burns told lauren's father what they found and that he didn't need to see that. >> he just sort of stared at me, and he said, i agree. and that was pretty much the end of the conversation. >> wow. >> you give a lot of death notices, but that was tough. i mean i got a son and three daughters, and it was tough. >> but who, who would commit such a violent crime? dismember a victim and then cover his tracks so carefully, like someone had planned it, was killing to satisfy some sick craving. did you think that morning that maybe we're dealing not only with a sick individual but potentially a serial killer? >> that was one of our concerns, that somebody, a serial killer could have gotten off the interstate, killed her, got back

on the interstate and was gone. >> yeah, or could still be lurking around town somewhere. >> that was another concern. >> meanwhile, lauren's friends and neighbors were sitting in separate interview rooms without their cell phones, cut off from the news outside, answering questions. among them, the apartment complex's maintenance man, also a law student, who said he hadn't seen lauren for a while. her neighbor said he hadn't seen her either. stephen, the law student right next door who helped try to find her. >> you've been home all week, right? all weekend? >> mm-hmm. >> and you stated that you've -- the last time you seen lauren was -- >> either -- either last week or the week before. >> but it's been a few days? >> yeah. >> stephen didn't exactly look like a lawyer-to-be, but he'd been her neighbor for three years, had served with her in the local branch of the federalist society, so he certainly knew her. but like everyone else, he said

he'd been busy studying. >> with bar prep, we -- we just work on it and work on it. >> there were more friends and cops talked to all of them. even a running buddy, who joined the party that friday night at the bar. >> you kind of hung out with her for a little while? >> i was there with her for 45 minutes that night. >> but he said he hadn't seen lauren since. >> do you know where lauren is? >> no. >> nobody was immune from suspicion, even among that group of friends. >> you're thinking about your friends, and you're questioning your friends. you're never asking them, hey, did you do something to lauren, but you're -- you're wondering in your mind. >> can't stop that wondering. >> no. i mean who do you trust? you can't really trust anybody, and that's terrifying. >> did that include joe?

>> yes. i'm ashamed to admit it, but yes. >> joe, the ex. what did you learn about him. >> that after a couple of months, lauren called it off. he didn't call it off. >> joe told detectives lauren spent the night in his room friday night but she left the next morning, said she was going to the pool at a local country club. but did she make it there? detectives checked and -- >> we was able to trace down her credit card, which she had made a purchase at the same pool. >> and that zaxby's receipt her friends found, that was time stamped 6:08 saturday, so they pulled the video. hard to tell which was lauren's car and if anyone was with her. joe, for example, had he rejoined her? impossible to tell from this. >> really no one could vouch for him because we were all doing our own thing. we were all studying. >> it seemed pretty certain lauren was still alive and well

at 10:13 p.m. because that's when she sent that strange email her friends found on her computer. >> essentially that she thought someone was trying to break into her house a night prior. >> the recipient of that email was the man she intended to move in with, david. now the detectives wondered if they were dealing with a love triangle gone wrong. had david found out about lauren's night with joe? some people react badly to that sort of thing. >> very badly sometimes. >> yeah. so down at the station, detectives questioned david on tape. >> we found a body. we don't know if it's her or not. >> i had heard that. >> all right. >> so i need your help. >> you've got it. >> somebody knows something. >> david told the detectives he was far away the weekend lauren disappeared. >> he had taken a golf trip to california. >> he said he hadn't talked to

her in a while. >> so you're telling me the whole time you were gone to california, you didn't call her, check in with her or nothing? >> no. >> then you land in atlanta and just go back to your apartment or house, and you didn't even call her and tell her you were home or anything? >> no. if you -- >> really? mind you, the detectives had already heard from lauren's law school friends. >> people that she goes to school with says that y'all have had problems. >> we've never had -- >> recently. >> well, in march we kind of stopped talking, and then through may, and that's her graduation. she sent me an email saying would you at least please come. it's never been fluid and continuous because when i felt the pressure of the commitment, i just kind of backed off. >> but of course they couldn't just take his word for it. they asked david for proof, receipts, documents to show he was away in california when

lauren was murdered. so did he just hand them over or what? >> he didn't have them with him. >> david was free to leave the police station. they'd follow up with him of course. and back at the apartment complex, they found something. but what did it mean? coming up, one of the men investigators have already interviewed is about to attract their attention all over again. >> i thought that's odd. very odd. >> and then a discovery in a maintenance closet at lauren's complex. >> it looks like blood. >> when "the watcher" continues. with soothing honey-licious taste. nyquil honey. the nighttime, sniffling, sneezing, coughing, aching, stuffy head, fever best sleep with a cold medicine.

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lauren giddings' friends and neighbors had spent hours at police headquarters answering questions but getting no answers back themselves. so when police dropped them off near the apartment, they were surprised by quite a scene. >> it was completely blocked off. news reporters were there.

sheriff's office was there. crime scene was there. >> the tv people knew a body had been found. that's why they were here. but some of those had been down at police headquarters weren't quite up to date, like stephen, her fellow law student and next door neighbor. >> he's telling, we've been trying to look for lauren. we've been out trying to find her. we don't know where she is. >> when stephen started talking to local station wgxa, he seemed relaxed, chatty. but then the reporter broke the news to stephen that a body had been found. here's what happened then. >> i think that's where they had recovered the body or whatever they recovered from there. >> body? >> had you seen anything there? >> stephen stopped as if struck. >> are you okay, sir? >> i think i need to sit down. >> i thought, that's odd. very odd. >> lieutenant gatlin checked on him. >> he was sitting on a cooler outside of our command post. someone was trying to talk to

him, and he just stared like he was staring off into space. we even shook him, and he still kept staring off into space. finally i had to end up doing a sternal rub on him, which is a small, painful stimuli that you give someone to -- >> on the sternum? >> to check to see if they are unconscious or alert. >> so that perked him up a little bit. >> it woke him up. he all of a sudden, like he came to life and said, what happened? don't know what was going on in his mind that made him act like that. >> was it just surprise or what? stephen had already allowed detectives to bring a cadaver dog into his apartment, and it did show some interest, but it was hard to know if it meant anything. but that combined with stephen's odd behavior was enough to take him back downtown to the station for another chat with questions a little more pointed now. >> was you friends with lauren? >> yes.

>> look at me when you talk to me, son, okay? was you friends with her? >> yes. >> every answer was yes, no. hands on the table. we had to tell him to look at us when you talk to us. >> stephen, did you hurt lauren? >> no. >> i know this is hard for you to tell, but it's weighing on you right now, ain't it, stephen? >> i didn't do it. >> stephen didn't budge. he insisted he had nothing to do with the murder and didn't know who did. as he talked, investigators combed through his apartment. no blood, no sign of any trouble. but this was interesting. >> they found some condoms in his dresser drawer. >> wouldn't be unusual, of course, for a guy stephen's age to have condoms except stephen had told investigators he was a virgin and saving himself for marriage. interesting. >> so the detective interviewing him sort of changed course and

says, why do you have condoms? that's when he changed a little bit. he got quiet. i guess he was thinking. and then he says, i got them from so and so's apartment. >> an admission that he stole condoms? yes, he admitted, right out of the apartments of two of his neighbors. >> so we charged him with burglary. >> while they held him, they took a good, hard look all around the apartment complex. >> this is like a community laundry room for the residents. so it's got washers and dryers. >> and inside -- >> this is the maintenance room. >> they found this other door, a maintenance closet locked up tight. they used a key, looked inside, and found something. a hacksaw with something on it. >> it looks like that's blood on each end of the saw blade where obviously somebody had rinsed it off but didn't do a thorough job. >> but wait a minute.

who had a key to the closet? the maintenance man. >> he had a master key to all the apartments in the complex and the door where they kept supplies in the laundry room. >> so did you bring him in for questioning? >> we brought him back in. >> the maintenance man said he didn't buy that hacksaw and provided an alibi. but by then the investigators knew the maintenance man wasn't the only one with keys because in stephen's apartment -- >> we found two keys on his dresser that stood out. >> mm-hmm. >> one of them was a brand-new key, and the other was a key with a georgia bulldog emblem on it. >> they tested the georgia bulldog key. it was a master key to the complex, including a maintenance closet. and that second key -- >> was cut to fit her apartment. that was the key to her apartment. >> to her apartment? >> to her apartment, yes. >> a key to lauren's apartment. why on earth would stephen have that? they got more search warrants to

stephen's place, and this time found women's underwear. test results proved they were lauren's. and then they found this. >> we found packaging for that same type of hacksaw in his apartment. >> it was the same type as the one found in the maintenance room. >> same size and brand and everything. >> now they felt certain they had their man. they cleared lauren's boyfriend david and ex-boyfriend joe. no surprise at all to lauren's friends. >> i had never thought it was david. i never thought it was joe. >> they eventually cleared the maintenance man too. and on august 2nd, five weeks after lauren disappeared, stephen mcdaniel, the quiet young law school grad, was charged with murder. he maintained his innocence, pleaded not guilty. and resident a crime so awful, a dismembered victim? stephen had seemed so harmless. had no criminal record.

the evidence against him was circumstan circumstantial. >> i was worried that unless we had more, this would be a case where everybody knew that he did it but nobody could prove it. >> time to take a harder look at the evidence. coming up, a defendant who seems quite confident. >> there was a certain swagger that he and his team had. i think they felt that they could win it. >> but investigators are about to discover a certain piece of deleted video. what it was it like to see that? >> i knew we had him. >> do they, though? when "the watcher" continues. save more for adding drivewise. save even more for driving safely. see how much you can save with allstate. visit allstate.com or contact your local agent today. - [announcer] forget about vacuuming for up to a month. shark iq robot deep cleans and empties itself into a base

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we are doomed. [laughter] that's it. i figured it out! we're going to give togetherness. that sounds dumb. we're going to take all those family moments and package them. hmm. [laughing] that works. lauren giddings' law school friends couldn't make sense of it. how was it possible their odd, nerdy classmate stephen mcdaniel could do such a horrible thing? >> he was trying to make it seem

like he was this innocent bystander and a friend of lauren. >> when bibb county district attorney david cook took over, it was already a death penalty case. but he wasn't so sure it should be. after all, they had no evidence to prove the cause of death. and this was a gruesome crime, yet none of stephen's dna was found in lauren's apartment. and aside from the underwear, none of lauren's dna was found in stephen's place. and the circumstantial evidence they did have, a good defense attorney could raise reasonable doubt, perhaps claim stephen had been framed. >> he could reasonably argue that the crime scene, particularly his apartment, wasn't adequately secure. >> sure. >> and that other people had access. >> indeed they did. >> and, therefore, you can't prove i did it. >> yeah. >> so there was a certain swagger that he and his team

had. i think they felt, not unreasonably, that they could win it. >> and sure enough, stephen's highly regarded macon attorney had already accused the state of getting evidence from improper search warrants. >> i think there were eight or nine searches of stephen's apartment. >> and lauren's underwear and the apartment keys and the hacksaw packaging, all of that evidence, said attorney frank hoag, should be thrown out. did you believe that the prosecution was particularly worried about your challenges? >> yes, i did think they were. >> this the defense attorney hoag had known and admired lauren. >> i was her teacher in a transition course from law school into law practice. >> a fact hoag told stephen before joining his defense team. stephen was all right with it. anyway, that's why hoag knew lauren herself was opposed to the death penalty. so he took it as a victory lap when the d.a. withdrew it.

then technology. the georgia bureau of investigation had searched stephen's computers, didn't find much. but now they had new software. the d.a. asked them to take another look. >> i thought there is no way that this guy has her panties in his apartment, has the hacksaw packaging in his apartment, has a key to her apartment, and committed this kind of murder and doesn't have an internet history that would blow your mind. there is no way that's possible. >> so he asked the experts to look for anything related to lauren giddings, sex, and violence. >> and when they did, it just exploded. it's obvious that he has a fascination with sadistic pornography -- murder, torture, dismemberment. >> that's digging under a layer of things which had been erased and expunged apparently from the computer. >> yes. >> they never go away. >> yes.

and what they found told us everything we needed to know about stephen mcdaniel. >> kell >> tell me more about that. >> some of it's so bad that it can't be captured in photographs or movies because it's so criminal, and it can only be drawn. >> wow. >> vile, and yet still not proof that he murdered lauren. so in spring 2014, nothing was certain. as lauren's family and friends prepared to go to macon for trial. >> it's like the rest of my life stopped. it was all about lauren and this trial. >> why do you think it was so important? >> she was my best friend. >> yeah. >> she meant the world to me. her family means the world to me. >> and finding the person responsible and -- >> and getting justice served was all i cared about. >> and as the two sides were ready to face off in court with stephen still claiming his innocence, the fbi probed the

secrets of stephen's digital camera and recovered this. oh, my. >> the video was him spying on her the last night she was alive. >> he was all stealth. must have taped his camera to a long stick, said the prosecutor, so he could peer through lauren's window and into her apartment. chilling. here was a predator in the final stage of planning. >> he was spying in there to see if she was home because that is the night i think he planned to kill her. >> lauren was right. she did have a stalker. someone was trying to break into her place. what was it like to see that? >> i knew we had him. i just knew we had him. >> attorney hoag had to agree. >> that would have been virtually insurmountable evidence at trial.

>> and so in late april 2014, stephen cried uncle. he'd make a deal, plead guilty, and confess to murdering his neighbor, lauren giddings. >> he admitted that he came into her apartment in the middle of the night, that she said something to him, essentially telling him to leave but colorfully. >> yeah. >> and that he attacked her. she fell off the bed as they struggled. her legs ended up under the bed, where she couldn't kick him or get out from under it. >> uh-huh. >> and that put him at an advantage. >> stephen said he strangled lauren to death, then dismembered her body, put her torso in the trash bin at the apartment. the other remains in the law school dumpster. over the years, police and volunteers searched for countless hours, even dug up a landfill, but never found anything. lauren's loved ones, including

boyfriend david, looked on as stephen was sentenced to life in prison. he'll be parole-eligible in 2041. stephen, the d.a. believes, had been planning to kill for a long time and took pleasure in what he did to lauren. >> here is someone who told his friends for years leading up to this that he thought he could commit the perfect murder. it was an obsession for him. his dream was to commit murder and to get away with it. >> so he'd been thinking about this for a long time. >> oh, yes. >> and he almost succeeded. had the police not turned up to check out what was then a missing persons case, had their cars not prevented a garbage truck from picking up the bin outside the apartment. >> the body would have never been discovered, and we never would have captured stephen mcdaniel, and we never would have gotten justice.

>> and now memories of a friend's last parting. >> i remember hugging her, saying good-bye. >> in retrospect, does it matter now that you did that, that you hugged her? >> oh, absolutely. >> memories for a family of a daughter and sister who loved to run. >> i'm happy when i think about her. when i run, it pushes me to run farther. >> my daughter is named lauren magnolia. >> memories of a vibrant woman fully alive. how often do you think about her? >> all the time. her picture is in my office, and i always think about, you know, what would lauren be doing right now. i mean it's constant. she never leaves you. >> if you could say something to her, what would it be? >> i would tell her how much i

miss her and that i love her and that she's the reason why i am who i am today. i would tell her thank you. i'm craig melvin. >> and i'm natalie morales. >> and this is "dateline." >> our hearts break for this mother. people don't randomly disappear. >> she was a design original. christina. the fashionista.as >> the most fantastic wardrobe. >> it was news nationwide when she vanished. >> she went out to drinks with friends and never came home. >> i said something's wrong. >> we realized this is real. >> who was the last to see her? >> she went her way. that's all i can tell you. a >> and where was her ex-model boyfriend?