>> we are at this point the constant in her life. we want her to feel protected, loved, everything that i know her mom would have given her. >> that's all for this edition of "dateline. " i'm natalie morales. thank you for watching. watching >> i'm craig melvin. >> and i'm natalie morales. >> and this is "dateline". my sister's dead. and i just -- sorry. i just kind of fell apart. >> inside a silent home, an eerie scene. water pouring through the rooms. >> you heard the water running? >> yes. it was just gushing. >> clues would be hard to come by.

>> i thought it was over. she was just dead and nothing was ever going to be done about it. >> not if this family could help it. >> we started looking and looking for what happened. there was still water in the tub. we pulled the drain and saw black scuff marks. >> a case that would see the suspect leave town. and unearthed dark deeds from the past. >> she would wake up and he was be standing over her. >> that's creepy. >> she told me that he was following her. >> yet justice was anything but certain. >> you want that smoking gun. >> uh-huh. >> and there's just not one. an.

hello, and welcome to dateline. cassie farrington was building a new life, in the tiny desert town she called home. the single mom had two beautiful kids, a doting boyfriend, and an exciting new job. that future washed away when cassie was found dead in her bathtub. unsatisfied with the police investigation cassie's parents set out to solve this mystery and would stop at nothing to get justice for her daughter. here is keith morrison with suspicion in silver city. >> out in the middle of new mexico, hours of desert highway from better known haunts like santa fe is an old mining town called silver city. such an unusual place it is, quirky would be a good word. >> very old west. there's a lot of history in silver city. >> a vast area today sir one

way out of town, lush green mountains the other. fourth, fifth, sixth generation ranchers and silver miners coexisting with artist and hippies, why that newcomers. as we say, quirky. >> it's just lots of different perspectives, which is elsa was fascinating. but, of course, this is not a travelog. no, this is about what happened here, or more precisely what happened there inside that little house to her. >> she was beaten from head to toe. she had bruises from the top of her head down to her feet. >> her name was cassy farrington. and what was done to her in the bathtub of her own house was dreadful.

>> she's in the bathtub. and i can't even do cpr. she's stiff. >> it was also, for a very long time, an unsolved mystery. cassy brooks was her name then. her mom and dad, darlene and chuck. >> she was very, very outgoing, driven, motivated. >> from when she was a little kid? >> yes, from the time she was little. straight "a's" all the way through. perfect grades. >> wow. >> she worked hard. >> cassy seemed to be good at pretty much everything. >> she lettered in five sports her senior year too, and she was in the national honor society, future business leaders of america. >> she aced high school in just three years. >> she never quit. i would have to make her take down time. no,

dad, i have this. no, it's time for a break because she just pussed herself so hard. >> she anouvensed to her family that she was going the to be a doctor. and then she was 16 years old. she tried to hide what happened, but of course couldn't. she was pregnant. med school was not going to happen. and then, said cassy's siblings, elizabeth and beaux, events kind of whizzed by. >> she had a baby, got out of the hospital, graduated high school, got married and moved out, in one months. >> wow. >> it was super fast. >> but, the marriage didn't last. by 22, cassie was on her hone, in silver city. she had two small kids, working as a nurse.

in fact, she moved into a house owned by one of the nursing professors. this woman, charles knell lee. was she a good? tennant >> oh,. yes like, the best. >> spit spot all the time. >> always. yeah, she was awesome. >> just around the time china was heading toward a breakup with her husband, billy. billy was also a nurse, maybe a mentor, of sorts, to cassie. he seemed to be very fond of her. saw her a lot, at work, around the house. then, pretty soon, a serious boyfriend came along for cassie. david barry. >> he was wonderful with the children, and that was something that she really liked about him. >> casey's friend and coworker, mary flores. >> they had a relationship that was fun. they were just building a life together. >> especially on the morning of march 24th, 2014. something billy lee had been

trying to arrange for her, came through. >> she had just been notified by billy, that she was getting off of the med surge flora, going to the er, the job she. wanted >> casey had just finished a graveyard shift at the silver city hospital, when she called her mom to tell her the news. that was a plum job, the ones you always wanted? >> yes. >> then she went home to get the kids off to school, and have a nap, before meeting her friend, mary, again later. >> i had heard that the shift was particularly difficult. so, i texted her and told her to go home and get some rest. and then, when she got up to get the kids from school, we could all -- they could come by, and we get ice cream or something. >> the afternoon came, and no cassie. >> i understand. you have kids, and who knows? i mean a, million things could've come. up >> when cassie's parents got a call from the grandson to say

she didn't pick her up, they weren't really worried. >> i was hoping that she just slept through her phone, because she'd were graveyards the night before,. >> but, eventually, a request to chanel, the landlord, could you check on cassie, please? >> so, i drove down from my house up the hill. down this way, and up here, to go in and check on her. >> which is where she noticed the strangest thing. >> i look to the door, and there was water. you could see through the door, there was water rolling out. i knocked. >> was it coming out under the -- >> no, it was rolling out of the kitchen. >> weird, that would be very strange. >> it was very strange. >> as soon as i saw that, and i knocked, i called for cassie and nothing happened. so, i had to go up to the other house to get the key. >> and then just came back? here >> yeah, then i lock the door. >> dread grip for then.

something bad in there. and where was cassie? >> a home full of water, an ominous sight, but nothing compared to what came next. coming up, >> you are a nurse, using lots of things. >> yeah. >> but that can't be easy. >> no. >> when dateline continues. o. >> when dateline continues long walks.... that's how you du more, with dupixent, which helps prevent asthma attacks. dupixent is not for sudden breathing problems. it's an add-on-treatment for specific types of moderate-to-severe asthma that can improve lung function for better breathing in as little as two weeks. and can reduce, or even eliminate, oral steroids. and here's something important. dupixent can cause serious allergic reactions, including anaphylaxis.

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her tenant, cassy farrington, opened the back door and was confronted by water everywhere. and you heard the water running? >> yes. it was just, like, gushing. >> coming from? >> the bathtub. >> so she ran to the master bathroom, intending to turn off the water. and there she was. >> i saw her in the bathtub. it was like i've never seen anything like it. it was heaped up, and the waves were just, like -- >> that's a deep -- big -- >> -- cresting. >> -- deep bathtub, too. >> yeah, it was, like, cresting. and she was on the top. >> oh. >> and she was -- >> in the water. >> yeah. she was upside down. and it was -- >> face down. >> right. right. >> i mean, you're a nurse. you've seen lots of things. >> yeah. >> but that can't have been easy. >> no. well, at the time, you know, you're just in like emergency mode, you know? you just -- you don't even stop to think. you -- and so i just went and grabbed her and pulled her over to here and turned her over to see if there was something i could do to help her. i mean, it was kind of

horrifying because she was still in her nursing scrubs. and then i checked to see if she had a pulse an she didn't. >> nothing to do now but call 911. >> she's been in the bathtub and i -- i can't even do cpr. she's stiff. >> okay, so she's unresponsive right now. >> she's dead. >> as charnelle talked to the 911 dispatcher, she turned off the faucet and -- >> oh, my god, why is there water running everywhere? that's weird. i heard water running in the extra bathroom. >> at the other end of the house. >> yes. >> so charnelle ran back there and discovered water running in the other bathtub, too. no flooding. that drain was unplugged. and when she turned off the water, charnelle noticed that the towel rack was broken. this bit right up here. >> yes. >> it was just sort of yanked off the wall then, huh? >> totally yanked off the wall. >> huh. >> and then that's her -- >> leaving a gaping hole or something, right? >> right, yes.

>> by then the grant county sheriff deputies were arriving, and they asked charnelle to leave. what'd you see? >> i saw water on the ground on the north side that had been coming out of the trailer. it was still dripping, in fact. was still dripping, in fact. >> lieutenant ray tavizon was the supervising chief deputy. while his lead detective, jose sanchez, took charge of the scene and the investigation, tavizon had a look around. any sign of forced entry anywhere? >> no, no. >> no sort of footprints or tire marks or anything? >> no. the way the ground is, the gravel and stuff, there wasn't any. >> and inside the house? >> we saw that there had been what looked like maybe a scuffle in that bathroom. >> what told you that? >> well, there was a broken towel rack -- >> uh-huh. >> -- laying on the floor. there was a pair of glasses laying on the floor. and then from there, we went to the north end of the trailer. her bed was made. it hadn't been slept in. her lunchbox, her backpack and her purse were all

on the foot of the bed. >> in other words, this was not a robbery. >> apparently not, no. >> it didn't look like it. they would have taken that stuff. >> correct. there was a laptop in the bathroom. >> uh-huh. >> and then she was laying on the floor. and at that point, i went out and called my superiors to inform them what we had. >> there is no getting over the phone call cassy's parents got then. >> all i remember is she starts screaming, "no! " and then she told me, "they found cassy dead in her home. " and i just grabbed my car keys, and we were out the door and gone, headed to silver. >> what was that drive like? >> it seemed like it took forever, but it was the fastest i'd ever made that trip. >> what goes through your minds? >> we're just hoping that they're wrong. >> yeah, hoping they were wrong. >> but they arrived in time to watch cassy being carried away in a body bag. and then,

traumatic as that was, as they stood there, lieutenant tavizon approached them and seemed to say it looked like she'd committed suicide. >> lieutenant tavizon mentioned to you how many times, three times? >> three times in that evening. he brought up suicide and -- and i said she wasn't suicidal. >> as if, what, he's trying to persuade you that that's what it was? >> yes. >> it wasn't a suggestion that was made. it was a question that was asked. >> but sitting here, all this time later, lieutenant tavizon told us they must have misunderstood him. you heard that they eventually decided that what you had done was suggest that it was suicide. >> well, yeah. they were -- they were upset because i asked the question. >> did you think so at the time? >> no. >> so what did the lieutenant think? >> a young lady just doesn't die, you know, just out of the blue. we consider it a homicide till we're proven otherwise. >> sure. of course, there was

that other matter that needed proving. who did this? >> coming up -- after just a few hours at the house, detectives leave the scene. >> how can you be done with your investigation that quick? >> so the family decides to do a little detecting of its own. >> there was still water in the tub. we pulled the drain. and we saw black scuff marks. >> when "dateline" continues. or...oh! i can't wait to go there! or reunite there, ♪ ♪ start here. walgreens makes it easy to stay protected wherever you go. schedule your free covid-19 booster today.

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encounter, cop or not. so young. just 23 and a mother of two. but there she was. and what happened to her, as the deputies could clearly see, was close up and intense and murder. did you see any obvious injuries on her body? >> well, there was some bruising on her arms. there was

some bruising around her neck. >> what was less clear, however, was exactly how her death was caused although -- did it leap out at you, though, and say, "somebody beat this girl or strangled her, or something"? >> it was suspicious. very suspicious. >> the sort of thing that could keep crime scene investigators busy all night. swiping for dna, taking fingerprints, collecting all the bits of evidence. and yet -- and this was very strange -- after just a few hours, during which they didn't do those things, the deputies left and told cassy's family, "go on in if you want. " >> yeah, they released the house. "you can go in. " >> and they put their hand to -- at the door, "you can all go in now. " >> how can you be done with your investigation that quick? >> odd. not exactly normal protocol, especially since once people start walking in and out, the scene becomes highly compromised. did you go into

the house that day? >> yeah, when -- when they said, "you can go into the house, " we went in. >> they were hoping to find some sign or clue to explain what happened to cassy. but they never imagined they'd find evidence that the deputies just left behind. >> there was still water in the tub, so we pulled the drain. and when we pulled the drain, then we saw black scuffmarks, like, from shoes, rubber. black rubber -- >> in the tub? >> in the tub. >> and where did those scuff marks come from? >> from a struggle. >> they also found cassy's glasses and a hair ribbon near the broken towel rack. no one had bothered to collect them as evidence. so they did. it's so strange to have the family as a kind of csi group. >> yeah. we gathered up the hair with the bobby pin and the ribbon, her glasses. >> did it seem shocking -- >> we were gathering evidence. >> -- to you that you were gathering evidence and not -- >> that was -- >> -- the police? >> -- frustrating. >> yeah. >> kind of, like, a tell right

off the top. this isn't gonna necessarily go well. deputies did return to the house the next day, though, and discovered the carpet in her bedroom was gone. >> billy lee, the landlord, goes in and starts rippin'the carpet up. >> wait a minute. >> yeah. >> you've got a guy going in right after, and the first thing he does is rip the carpet out of the master bed -- >> well, it's soaking wet. >> and that finally seemed to get the attention of the lead investigator, sergeant sanchez, who by then already had a few reservations about mr. lee. why would he remove the carpet? to get rid of evidence? and what was his relationship with cassy? >> mr. lee told him that he really didn't have any dealings with cassy. then later found out that she had applied for a position in the -- in the emergency room. and billy lee was the one that was helping her. and that's what threw red flags up for -- for sanchez. >> why?

>> well, because he was thinking maybe he was there to try to collect a favor for -- for getting her the job. >> did cassy reject billy lee and pay a terrible price? a few days after cassy's death, the investigating deputy set out to officially question billy. but billy was gone, had quit his job and left town, was far, far away in alaska without his wife. >> i was like, "wow, he's going to alaska. maybe sanchez is on to something. " >> but that's exactly what people do. you know, they get in trouble. they take off for alaska or someplace like that, or mexico or something. but for whatever reason, no effort was made to bring billy lee back to silver city for questioning. and investigators quickly turned their attention to another man in cassy's life, her live-in boyfriend, david berry.

>> his behavior the first few days after her death was very strange and peculiar to me. >> how so? >> i, myself, never really saw him shed a tear. but i was suspect of everyone that had any contact with her. i didn't trust anyone. >> at the funeral cassy's casket was left open to tell the world what was done to her, said her siblings. >> her face was covered in bruises. her neck was a giant bruise and swollen. her hands were black. >> but who had done it? for months, all anyone could do was speculate. >> i thought it was over. i thought she was just dead and that was it and nothing was ever gonna be done about it. >> at the sheriff's office, investigative supervisor tavizon questioned his deputy, sanchez. why hadn't he even dusted for fingerprints?

>> he said, no, he said, "it's too clean. " to him it wasn't anything that would've been helpful to the investigation. >> kind of an assumption there, huh? >> well, i guess i would -- that's what you could call it. >> what's the old expression? to assume makes an ass of you -- >> it makes both -- >> -- and me. >> yeah, exactly. so, with zero physical evidence to point to anyone, the case of the murder in the bathtub went cold. until? until six months later, a particular friend, once suddenly gone, just as suddenly reappeared. time for a pertinent question or two. >> coming up -- billy lee back from alaska admitting he and cassy were close. >> we were real good friends. >> but what will he say to this? >> did you inflict any injuries to the victim on march 24th?

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hammer the northeastern u.s.. saturday, blizzard warnings from new jersey to maine, and nearly all flights in new york city have been canceled. more than two feet of snow could fall in parts of new england before the storm departs, as thousands of homes lost power in massachusetts alone. the governor declaring a state of emergency. express retake that this will be one of the worst storms to hit the region in years. now, back to dateline. >> welcome back to "dateline." in the hours and days after cassy's death, her landlord's husband. was acting suspicious. detectives wondered if billy had something to hide, but failed to call him back for

questioning. cassy's family felt the investigation was being botched. here again is keith morrison with more on silver city. >> cassy's parents were in pain, deep endless, about her murder and the long wait for justice. >> that period of waiting? >> hard. very difficult. difficult on us. between us. >> how come? >> i was going all the time. >> few things-y didn't marriage quite like grief. even the best marriages. >> all she wanted to talk about was casey's case. >> one months won by, no arrest. >> i finally got to the point you are told or, i can't do this anymore. >> i thought about it to, but i

don't want to talk about it all time. >> but, the topic was unavoidable. and the new leader development had to be discussed. the medical examiner's report, for instance. that income out for four months. when it finally did, it was vague. >> it was homicide, by undetermined means. >> undetermined means? with bruises all everybody, and apparent strangulation? >> and they wouldn't classify it as strangulation as the cause of death. multiple mechanisms, is what caused the death. >> they knew that if the case ever went to trial, that evidence could be a problem. that is, if it went to trial. because the resignation seemed to go nowhere. the family found things out, like how boyfriend had a solid alibi. so, why wasn't he officially cleared? >> why did arlene seem to be in more active investigator, the

deputy? >> she drove me nuts trying to play crime scene investigator. but, it also helps me to push the cops. >> too hard maybe? >> detective sandra said i'm tired of them calling me. >> but, they kept pushing anyway. >> i asked, will did you get billy lee here from alaska, and who is polygraph? >> he said, yes. >> >> remember, billy lee lived on the same property and was married to her landlord. hours after the murder, he whipped out cassie's bedroom carpet. then, left for alaska. the question was, why. >> months after he left, billy returned. >> and, sergeant sanchez had the chance to question him. >> but, curiously, sanchez did

not ask why billy remove the carpet. or, why he took off for alaska. but, he did ask the about the nature of his relationship with cassie. >> really? back at the crime scene, the day the murder, sanchez told a supervisor that billy claim to barely know cassie. now, they were pretty close. too close? billy told the detective that he had an alibi he, anybody were out on the country, working on his cabin. >> we were working on that roof, when i got the call. we had been out there for a couple of days. >> but, of course as, any detective could tell you, people all the time about alibis. sanchez asked ability to take a

polygraph. >> did you inflicted injuries to the flow come on march 24th? >> no. >> the results were inconclusive. not so good for billy and that alibi? it just kind of sat there unchecked. until, finally, a year later, lieutenant did some checking in confirm that billy's alibi was absolutely solid. the, when we tracked him down, he said, this. >> they never did, in my mind, -- never really, truly suspected me, because i had such an alibi. >> i hate to say it, but i've looked at what they were saying, you were their number one person of interest. . at least, one investigators person of interest. >> they never told me that. >> billy also found any suggestion that he was too close to cassie particularly offensive. >> absolutely never even

thought to have a relationship with cassie not even a little bit a traitor like a daughter. >> so, why take off to alaska? >> i had a lucrative job offer so, i took it. not even thinking -- >> that it would look bad? >> why would it look bad? >> he felt the same about that carpet that he ripped up in cassie's bedroom. there were some people that thought billy took that out of their -- >> what kind of evidence would've been in a carpet, more than one would've been somewhere else >> you know that questions being asked about you >> after the fact. sanchez said, why do you take the carpet off? i said, because you release the place that we need to say the flooring >> would about the polygraph? why that inconclusive result? >> i can tell you why instead, have you ever been in the house. i said, yes. and she kind of raise your eyebrows because that was our rental house. of course i've been in the house.

multiple times. >> maybe they should've as kathy's family, who didn't, for a minute, suspect billy they would've told the deputies that it was long past time to focus on someone new and who could that be? the person the family had suspected all along >> he did it he killed or we know he did. >> coming up, disturbing stories about one of the men in cassie's life. >> she would wake up and he would be in the dark watching or. >> that's creepy >> and then, a new theory on the case >> he set a cop to this. this is been done by somebody who had been training police tactics >> when dateline continues. >> >> a dreadful whispered

suspicion was making its corrosive way around silver city, new mexico, that somehow cops were protecting cops. the blue code, they called it. >> at first i didn't wanna

believe it, but as time went on, it became more apparent that it seemed that way. >> why? maybe because the investigation of cassy farrington's murder had been going nowhere for so long, even while the family kept trying to tell the detective, sanchez, that a particular silver city cop killed cassy. but the detective hadn't done a thing about it. >> he never questioned him? >> huh-uh, and i asked him that. and he said he was trying to eliminate everyone else that could be possibly a suspect, and then he was gonna talk to him. >> but sanchez's supervisor, lieutenant tavizon had already confirmed billy lee's alibi. boyfriend david's too. >> we know he was at work, he left at 5:00 in the morning to go to work in demning, and all that was verified. >> and still nothing happened. so one day months after the murder, the anger cassy's family was feeling boiled over. >> i called the d. a.'s office, asked for a meeting to complain

about the sheriff's department. >> and complain he did. forcefully, said chief deputy district attorney george zsoka. >> people got a little hot under the collar, the sheriff, the undersheriff were there. and lieutenant tavizon was also there. >> he and the others had to admit that lead detective, jose sanchez, had made mistakes, many mistakes. >> i had no reason to doubt him, but i should have. i should have micromanaged him. >> so maybe the whispers about some blue code were understandable, said deputy tavizon, just not true. >> we do not protect officers if an officer makes a mistake or commits a crime. we treat them just as we would any other person. >> the real reason behind a stalled investigation? >> just, uh, laziness. >> the decision was swift. sanchez was off the case. and

this ranch owner and veteran detective stepped in. >> i came in one day and i was told, "hey, we're going to assign you to the -- to the cassy farrington case. " >> sergeant jess watkins. see what you can find, they told him. >> first thing i did was i sit down, read through all the interviews, read through all the reports. >> and then he listened as cassy's family told him about the city police officer who had never even been questioned about the murder. >> i knew it was farrington that did it. >> brad farrington, cassy's estranged husband. when cassy died, the two had been separated for more than a year but were going through a nasty custody battle. >> as soon as we found out she was dead, we all thought it was him. >> cassy's family told detective watkins that cassy had been living in fear of brad for years and wasn't shy about saying so.

>> he had her convinced he was gonna kill her. >> watkins listened to their stories. many stories. one, when cassy's mom was right there watching. >> he has her against the wall on her side, but he has her in a headlock. >> didn't you wanna call the police? >> yes, but i felt like if i did anything, he would hurt her. >> and she would wake up during the night and he'd be in the dark, standing over her, watching her. >> that's creepy. >> yeah. that is the first time she said, "he's going to kill me. " >> and she really believed this? >> yes. >> the first time? >> uh-huh. >> how many times? >> she told me at least three times. >> and then there was this, what brad did to the kids. binding their hands and feet together, even taping the baby's mouth. cassy told her mom about it, said he called this a game. they were relieved when the couple finally split. and they liked her new boyfriend, david berry. >> i thought when she moved in with david, that maybe she'd be more safe, could get on with

life. >> the kids loved him. >> uh-huh. >> tristan actually started calling him daddy david, which cassy would be like, "you can't call him that. your dad's gonna get mad. " >> and sure enough, said cassy's sister, he did. >> he expressed to cassy that he didn't like it. that the kids better not call him that. >> he blamed cassy for it. >> yeah. >> and a few weeks before cassy's death, she told her parents, son tristan came home from a visit with brad utterly terrified. >> they ask him, "what's wrong, tristan? " he says, "daddy said he's gonna kill mommy and david. " he was 5 years old. i don't think a 5-year-old makes that up. >> by then brad was no longer on the police force. and things weren't going so well for him. when sergeant watkins finished reviewing it all, police reports, his own interviews, what he felt was something like amazement.

>> wow. nobody in this world is pointed out as having any reason to want to harm her other than brad. as long as she was alive, cassy had the kids and a new man and a great job. and he was losing everything. >> he no longer was working at the police department. you know, they hadn't reached any agreements on these kids. i think that was his way to take what he could from her. just say, "hey, look. those kids are gonna -- they're not gonna have you. " >> was watkins right? we asked to hear the farrington side of the story from brad or his family or both. we asked multiple times, but they told us they didn't want to be interviewed. anyway, for sergeant watkins, the evidence was too compelling to ignore, especially what came right out of the autopsy. photos which the detective said to the prosecutor told an unmistakable story. >> he said a cop did this, that

this had been done by someone who had been trained in police defensive tactics. >> what'd you think when you heard that? >> well, i thought, we now have the evidence we need to charge bradley farrington. >> five weeks after sergeant watkins took over the case and a year and a half after cassy was killed, law enforcement tracked down brad farrington in tucson, arizona, where he had taken the children, and they arrested him and charged him with first degree murder. just one nagging worry. there was no evidence at all to put brad at the murder scene. and without that, odds of conviction weren't good. >> i was scared that he was gonna get off. >> coming up -- at trial the defense comes out swinging. >> it will be clear that other people had access, motive, and ability to complete this crime. >> what will the jury think? >> i was so nervous. i just paced up and down halls, in and

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jess watkins took over the cassy farrington investigation, he came to believe what her parents had been arguing from day one -- cassy's ex-husband, brad, was the only person who would want her dead. now brad was heading to court, charged with cassy's murder. but with no physical evidence tying him

to the crime scene, could prosecutors prove it? here is keith morrison with the conclusion of "suspicion in silver city. " >> it was the day the brooks family feared they'd never see, brad farrington on trial for murdering cassy. >> i never thought we would get this far. >> too far? the prosecutor's opening argument was a warning to the jury -- we don't have a lot. >> no one saw the defendant enter cassy farrington's home. no one saw the defendant strangle her. >> no. and there was absolutely no evidence from the crime scene to help their case. the prosecution didn't even call the now-retired detective, jose sanchez, as a witness. >> what we were rather brief on was the scene. >> that was a weakness, actually. >> well, i don't know if i would call it a weakness, but it wasn't a strength. >> you should be in the diplomatic corps.

>> well, there just wasn't anything there that was terribly useful, so we showed the scene so the jury could see, you know, this is where it happened. >> it was unilluminating, and that was a problem, until the prosecutor argued for the right to present hearsay evidence, normally disallowed, and he won. >> brad was being verbally and physically abusive toward her. >> so, one by one, cassy's friends repeated stories cassy told them about her fear of brad. >> there would be times where she felt like he was following her. >> cassy was -- >> and then cassy's mom told the jury what she saw when brad was with cassy. >> and he had her in a choke hold on the bed. >> when you say a choke hold, can you describe for us just how he was holding her? >> his arm was up on her neck like this. he had her neck. >> to frighten, control?

darlene wasn't sure. but shortly before she died, said her mom, cassy confessed there was another reason, too. >> he liked to choke her during sex. >> how did that relate to murder? remember, the medical examiner was vague about the cause of death, but not this guy. dr. michael hunter, then chief medical examiner in san francisco. >> we're seeing bleeding within some of the muscles. >> he made it crystal clear to the jury that cassy's killer strangled her. >> once you see injuries to the neck, hemorrhages, evidence of assault, that you can form an opinion, and i have formed an opinion, that this represents strangulation. >> but why should the jury decide brad did that? >> he was in the academy from january 2006 -- >> this is ed reynolds, retired silver city police chief and also once brad's police academy

instructor, the man who taught him the chokehold. so eerily similar to what darlene demonstrated. >> his arm was up on her neck like this. >> all of which was interesting, said defense attorney nathan gonzales, but did not prove that brad was the killer. in fact, he told the jury they arrested the wrong man. >> it will be clear that other people had access, motive, and ability to complete this crime. >> but their star witness to drive that point home was none other than retired grant county deputy jose sanchez. and what he said on the stand? oh, my. >> mr. farrington a suspect in your investigation? >> no, he was not. not my suspect, no. >> now that was shocking, because sanchez had told cassy's parents that brad was a suspect. >> he believed there was an

altercation, a fight, and that he killed her and then took her and put her in the other tote. he told us that the day after her death? >> this is sanchez? >> this is what sanchez said. >> but now in court, sanchez told a different story altogether, which, if the jury believed it, would undermine the prosecution's entire case. >> i was focused already on -- >> mr. lee? >> -- mr. lee. >> mr. billy lee. >> why did you choose to focus on mr. lee? >> there was just too many discrepancies. >> remember, billy was cleared, had a solid alibi. but now the defense was using sanchez to raise doubt about who the real killer was. >> there's a lot of smoke here but no fire. >> mudles it up. >> and that, i believe, was the defense strategy, that if you have enough of that, then the jury won't see through it. >> the jury retired to consider. >> oh, i was so nervous, i just

paced up and down the halls, in and out. >> four hours later, they were called back into court. >> has the jury reached a verdict? >> we have, your honor. >> the defendant shall please rise. we find the defendant, bradley farrington, guilty of first-degree murder. >> when they announced their verdict? >> there was a lot of tears, a lot of sighs of relief. one of the deputy attorneys says, thank you for not giving up, thank you for pushing. and i said, how could i? it was my little girl. >> brad farrington was sentenced to life. no parole for at least 30 years. he's filed an appeal. cassy is but a memory now, and so, her parents remember their way through their pain to the good in her life. the kids live with brad's family now. and when we last spoke to chuck and darlene, their one hope was to see their grandchildren again. >> they don't allow us to see or talk to them. >> what would you want to say

to them, if you could? >> that we love them. >> that their mama loved them unconditionally. >> that's all for this edition of "dateline. " i'm natalie morales. thank you for watching. good evening, i'm katie fang infirmity hassan we finally got to hear, this week from officer eugene goodman one of the heroes of the january six insurrection he received a congressional gold medal, and escorted -- for his actions luring rioters away from the doors at the senate chain burr, that was the harboring lawmakers inside officer goodman told a podcast, this week, that he didn't even know, that rioters had breached the