dateline. a young mother disappeared one her husband said she went for a run and never came home. the puzzling case happened in a safe, suburban neighborhood where crime is unexpected. but sometimes there are secrets hidden behind closed >> it all seemed like such a bad this doesn't happen in our happy little world. >> reporter: it was a saturday morning in july. the happy little world suburb of raleigh, north carolina, called cary, a place where a young family would aspire to if you were someone like hanna pritchard, for example. >> there's always lots of friend making going on through someone you meet. lots of cookouts and family functions. >> reporter: like the one in the neighborhood the night before. so hanna would have heard party stories that saturday morning from her friend nancy cooper. would because nancy didn't show up. >> i hadn't heard from her maybe by like 10:00, i called her house. brad answered and he said, she went for a run. >> reporter: nancy was an athlete, training for a half marathon. brad cooper was nancy's husband. >> i was like oh, okay. when did she leave. he told me 6:30 or i was like, she's not back? >> reporter: weird. if nancy had to cancel their meeting, surely she would have called. hanna cooled her heels. >> at 1:00 the phone rang and i saw on the caller i.d. it was her i answered the phone, hey, where have you been. he said no, hanna, it's brad. nancy's still not back. >> reporter: now brad was worried. >> i really started to panic. >> reporter: especially when she learned nancy had also stood up another of their friends. they called the local hospital. no sign of nancy. they called nancy's twin sister christa up in canada. >> have you talked to nancy today? she went for a run and she hasn't returned yet and we're very worried about her. can you call us >> you know about this kind of stuff? >> you would think. >> reporter: krista calls her older brother jeff, who is a police officer in edmonton, >> my first reaction, okay, she's she just needs some space or time. she'll turn up. >> reporter: when nancy's parents, gary and donna, heard she was missing, they were gripped by something dark and cold. >> gary said to me, donna, this story is not going to have a happy >> reporter: by afternoon the cary police were involved. >> all i was told on the phone it was a missing persons. >> reporter: when detective george daniels arrived nancy's neighborhood was already filling up with a small army of her panicked friends. nancy's friends rushed to join in the search. her husband brad made a public plea for help. >> anyone that knows anything, i just want them to contact the police with any information they may have. again, thank you to everyone that continues to come out and help out. >> sir, do you have a flyer? >> reporter: volunteers chased up and down the running trails where she loved to train, she combed the surrounding parks and lakes and this woman they had grown to love since she and brad moved down from >> when she walked into a room, that's where people wanted to be. >> reporter: she and brad were like a lot of people in cary, raising a family here, having got their start in another place and in brad and nancy's case, calgary, that's where they met back in'98. >> i really liked her. >> reporter: as did nancy's younger sister jill. >> it's someone who is warm, genuinely saw how much he cared for her. >> reporter: brad became a helpful member of the family, even designed the computer systems in the family business. >> our i.t. guy would say i want to meet the guy who did this, the networking system. he was kind of a legend in the i.t. world. >> reporter: he was so good, that cisco systems invited him to move to raleigh and work for the >> smart guy? >> smart guy. >> yes. >> if nancy was to go with him to america, for immigration reasons, they had to be married. so in the fall of 2000, they said their vows, an intimate family affair. >> how did she feel about going to north carolina. >> she was a little apprehensive. there was lots of tears at the airport, fear of the unknown, but i think she was excited. >> reporter: a few years later there were two bmws in the driveway, nancy a vast circle of friends and brad a bright future at cisco where he'd become an expert in the marriage of internet technology and telephones. best of all, two little girls, bela born in 2004, katie two years later. >> the best mother i've ever seen. she played and played and played. she was so hands on. >> reporter: and now, they were putting up missing posters. sunday went by, all day monday, monday someone called 911. >> the chief of the cary police department it is my very sad duty to tell you that the search for our nancy is over. >> reporter: it was a man walking his dog who found her. lying face down in water at the edge of a storm drain near a housing construction site several miles from the cooper home. >> our investigation is now a >> reporter: now they had to say it was a measure of the woman that total strangers joined nancy's family and friends, to share in the sorrow. >> i continue to thank the community for their generosity and it's overwhelming. i am one of the luckiest people in the world. i'm a twin. sorry. i have a bond with nancy that no one in the world all i have to do to remember her is look in the mirror. she will always be half of me, of nancy. i love you and i always will. >> reporter: now, of course, a homicide investigation was under but for detective george daniels, only this to go on. she had been she was found wearing only a sports bra and her diamond stud there were no marks on her body to indicate a beating, no struggle, no sign of sexual assault or it was a puzzle that landed in his lap. >> she wasn't raped. she wasn't assaulted in any kind of way. the earrings weren't taken. what was the reason for her to be over here? 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there were no signs of rape or robbery or that any struggle had occurred. >> we start going back to where we started at, saying okay, let's look at everything again. >> there were reports from people who said they saw a woman who looked like nancy running that saturday morning. one man said he watched her for a good 30 seconds, then saw a van make a u-turn to follow her. there were other reports of mysterious vans. friday one sped away from a cul-de-sac with no lights on. could any of this be tied to her killer? >> we're not walking away from anything at this point. everything becomes important. >> like the conversations with nancy's husband brad during the search. he told detectives he and nancy were up at 4:00 a.m. saturday to calm their crying 2-year-old katie and then 6:00 or so, he made two trips to the grocery store, after which nancy announced she was off to >> of course we went to find the video records of him going in and out of the store which we did, in fact, find. >> one of those talks with brad struck detective daniels as odd. when he asked brad, did you contact nancy's family? >> he had told us no. but it could be because he's frantic about the situation and wouldn't have time to call them. >> a little more talking and the detective learned there may have been another reason nancy and brad were having marital >> he told me the last two months they seemed like they were getting when i asked him why they had he told me he had had an affair. >> so daniels tucked that tidbit away and went on for the search for nancy. but after her body was found, things were the cooper house became a crime police in and out, turning the place upside down, and daniels kept his ears open. because among nancy's friends and family, people were certainly talking. >> we're getting all this information and we're having to separate what's important versus what's just part of a marriage. >> brad remember told detective daniels he and nancy were getting past the tension that his affair had caused. that wasn't quite the story he was hearing from nancy's family and friends. >> she felt very trapped and she didn't know what she was going to >> the marriage, it turned out, had been rocky from the start. brad seemed more married to his job than nancy. then in the spring of 2007, nancy's close friend heather told her she slept with brad. nancy confronted her husband. >> she just wanted the truth so she could fix it and go on. >> he said it didn't happen? >> for a very long time. >> made her feel bad about thinking that it happened. >> until months later, new year's eve day when brad finally came clean. yes, he told nancy, it happened. but he said, only once. really it meant they went to counseling and that's when nancy heard what she said was >> brad says to the counselor, the real story. it's been going on for a long changes again from the one-night stand to i think i love the woman. nancy came away from that and said i'm finished. >> they agreed to split, sell the house. nancy would move back to canada with the girls. and then suddenly, brad canceled nancy's credit cards. blocked her access to the bank account. put her on a cash allowance. >> i recall a time she was in the car with me and she called him and said, you know, i've got $2 and we don't have any diapers. >> nancy couldn't get a she had no green card. she began painting a friend's house to earn extra money. when she did, brad reduced her allowance. >> she must have been furious at >> furious would be an >> also tried to help nancy and she is very proud, she would feel i'm not going to take your money. this isn't your job to support me and my kids. >> nancy began locking important papers including the girl's passports in her car. >> i went down in february'08 it was awful. i had never seen nancy stressed out before. i never seen her raise her voice in the house. she was just miserable. >> reporter: miserable. stressed. each day uncertain, a painful struggle, an angry contest. >> she said, this is just, i think, a game to show me how difficult it's going to be. it's his attempt to force me back into this relationship. >> reporter: then, as nancy was preparing to move back to canada and with brad's blessing take the girls, one of those moments on which lives can turn, the arrival from nancy's lawyer of a proposed separation agreement. alimony, child support, private schools for the girls. brad would have to travel to canada for his twice monthly visits. he made no counter just told nancy the move was off. >> he saw what he was going to have to pay and all bets are off. >> reporter: and then, brad got ahold of the girl's passports, found them in nancy's car. they couldn't leave. nancy was trapped >> but as the father, it's his perfect right to prevent those kids from leaving. >> yes. it's also a way to say, if i'm doing half the child care, then i'm not going to have an alimony issue. >> to get her away interest her troubles, fancy's family took her and the girls on the vacation. >> how was it at the end? >> heartbreaking. i had her in my arms at the airport in charlotte and she was sobbing and she said mom, i just want to come home. and i'll never forget that day. >> reporter: it was the last time they saw her alive. and now that she was dead, nancy's family was sure brad had to be involved but detective daniels knew that demise of a marriage no matter how bitter it had been did not prove murder. there was more work to do. >> statistic says we should key on the husband and we're not going to walk away from that, but at the same time we're letting the investigation lead us where it goes >> dateline returns after the break it's another day. and anything could happen. it could be the day you welcome 1,200 guests and all their devices. or it could be the day there's a cyberthreat. only comcast business' secure network solutions give you the power of sd-wan and advanced security integrated on our activecore platform so you can control your network from anywhere, anytime. it's network management redefined. every day in business is a big day. we'll keep you ready for what's next. in the days after nancy comcast business powering possibilities. cooper's killing, the police chief here in cary, north carolina, tried to calm her jittery town, but her message was, well, curious. seemed to imply her officers knew something more than they were revealing. >> we still believe this is an isolated case. cary continues to be one of the safest places to live in the nation. >> isolated? how could she know, really? >> we still have not named a suspect or a person of interest. >> oh, but nancy's family had. the very day christal learned her twin sister was missing she called brad. >> i asked him pointblank at that point, what have you done? where is she? >> she didn't wait for an answer. she just hung up the phone. then, the day after nancy's body was identified, her family went to court to try to get those two little girls away from brad. >> by 4:00 in the afternoon, we had papers in the judge's hand for temporary custody of nancy's >> the family acted so fast because according to their complaint, brad's behavior was so before she disappeared, they had seen emotional abuse. and they were sure she never went jogging on july 12. then after she went missing? >> he was very stunned, aloof with the family and didn't contact anybody and he just didn't want anybody around, didn't want any it was strange enough to be alarming. >> reporter: and so they fear for bela and katie's safety. >> did you think they were in danger too? >> if he was a place to do this, the answer to that was absolutely. >> at the end of the day you have to live with the fact that if we're wrong, then this is way over the line. we did it for the right reasons. >> reporter: there was an emergency hearing, and the judge determined that the intense scrutiny brad was likely to face during a murder investigation put the children at risk. in late july the girls went back to canada to live with krista, their slain mother's twin and her husband. brad had not been charged with any wasn't even a declared suspect and he fought hard to get his daughters back. >> afterwards, i thought about it-- >> reporter: which meant three months after nancy's murder sitting for a videotaped deposition, in which brad answered questions under oath about his marriage, his affair and what happened the morning nancy so, were police investigators listening? oh, yes, they were. >> was nancy a good wife? >> i would say so, yeah. she was supportive of myself and of the very loving and generous. >> reporter: but there were two the trouble with cooper's marriage, one was money. the couple had serious debts. >> this past week i looked at the american express card from january 2007 to december 2007. of that, $27,000 was accredited to nancy's credit card. and mine was $17,000. >> reporter: it was to reign in nancy's spending, he said, he put her on a cash allowance. >> how much cash? >> at least $300. >> reporter: but nancy said brad was angry that they didn't have more money to spend. >> she referred to me as the budget nazi. i'm sure she probably said that once or twice in a heated conversation. >> reporter: the other issue? brad's sexual relationship with nancy's best friend heather. the issue which finally brought the marriage to an end. he called it his indiscretion. >> i had sexual intercourse with heather once. >> reporter: it happened some time at the end of 2004, early 2005, he said. >> and where did this sexual intercourse take place? >> it took place in our home, in the closet of the master bedroom. >> did you initially deny the relationship? >> yes. i initially denied it for approximately one year. >> why? >> i thought that if by denying it would go away and we could remain as a whole family. >> reporter: but when it became time for the family to split, brad said he found the monthly terms of the proposed separation agreement unreasonable. >> child support, medical, private school, extra activities, you know, kind of added it up and i ballparked it at over $5,000 to 6,000 >> reporter: he also explained why he called off nancy's move back to >> i realized that seeing the girls every other weekend would not be sufficient. >> reporter: and brad gave his account of the hours before nancy went missing. they were at a party across the street friday night. he >> when she opened the front door and i heard her come up the >> nancy and i tag teamed off and on, trying to keep her occupied, calm her down. >> reporter: he said he made two trips to the store that morning. on the the second trip nancy called him he said. he remembers being at an intersection when the call came in. >> do you know what time that would have been? >> i think looking at the cell phone records i think it said it came in at 6:40 a.m. >> reporter: when he came back from the store the second time, katie had calmed down, he said, and nancy told brad she was going for a run. >> i took katie upstairs, went in front of my computer, read some e-mails with katie in my lap. 7:00, he said, nancy left. >> how do you know that she left the home? >> i'm not too sure if she said somehow i knew she left. the door closed or she said later or something. >> reporter: that, he said, was the last time he saw her. three weeks after this deposition, three months after nancy's body was found, in late october, 2008, brad cooper was arrested and charged with the murder of his wife. so was it something he said? we're making the fagioli! ♪ ♪ ♪ ♪ this looks great. awesome. alright. thank you! what... what recipe did you use? oh. my nonna's! she a good cook? -no. more than 300 were treated for injuries that onsite field hospital, 13 remain hospitalized. in the new york city marathon returns for its 50th race after being canceled in 2020 due to the pandemic. the field was cut by around 40%, to about 30,000. runners groups are spread out in five different ways to help maintain distance from start to finish. now back to dateline. brad cooper was arrested for the death of his wife nancy. he admitted to having an affair, admitted that their marriage went through tough times, but was he capable of her murder? once again here's keith morrison. he was just the right sort of guy when she found him, bright, quiet stable. now brad cooper was on trial for murder. >> at this time we are ready to have the opening statements. >> it began this past march, 2 1/2 years after nancy's death. >> nancy cooper never went for a run from her house on july 12th of >> reporter: the prosecutors howard kum, amy fitz and boz had their own idea of what happened to nancy the night she disappeared. >> we think she came home from this party and said some things in front of him that might have upset him a little bit and he choked her. >> killed her then, their theory goes, put her body in the trunk of his car, drove to that drainage ditch, returned home to manufacture an alibi. why? she started with the shredded marriage, brad's affair, cutting off nancy financially, stopping her move back to canada. she was, testified nancy's friends, increasingly desperate. >> she said, jennifer, he's breaking me. she said i don't know how much i have left to fight. >> she told me when she slept at night she slept with her jeans on and the keys in her pocket with the children and the door locked. >> he never beat her. it wasn't physical, said the but he used financial power to exert absolute control. this, they said, was a form of domestic violence. >> she was in this abrasive, rough relationship at that point. he trapped her. he controlled everything about her life. >> reporter: wait a minute. nancy's allowance, remember, was $300 a week. would a jury think that was evidence of abuse? >> how do you tell a jury that he's depriving her. >> it's difficult. the facts still remain there are these signs of control emanating from that cooper household. >> it doesn't matter whether it's $1,000 a week or $10 a week. the fact of the matter is, is that it caused friction between the two of them. >> and so the jury heard about that last week of nancy's life, the week of war with brad. with nancy's father on the stand, prosecutors played a phone message nancy left her parents after she returned home from that vacation with her family. >> the house was so dirty. there were ants infesting on the table when i got there. >> as that last week went on, the fighting escalated. on the friday, her friend testified, nancy was shaking with anger when she revealed brad withheld her allowance that day because she earned her own money painting a friend's house. >> did she tell you what kind of day this was? >> this was an "i hate brad" day. she said three times that day, i hate you brad cooper, i hate you, i hate you, i hate you. >> reporter: diana lived across the street. it was her party that friday at which brad and nancy fought openly, she said. >> her tone was angry but also there was a tone of you're an idiot. >> brad went home with the girls answered 8:00. nancy stayed on, bitterly complaining about brad, to strangers like donna lopez. once in a while, said donna, nancy nervously looked across the street to her own house. >> how did you feel when you left that night? >> i was very worried for someone who i didn't know well. i thought i met someone really, really nice and told my husband, something really bad is going to happen over it's really bad. >> so, when nancy disappeared, her friends'eyes all turned to brad. after all, they knew about the conflict and jessica adam knew nancy was supposed to be at her house at 8:00 that saturday to paint. when nancy didn't show up, she called the police. >> i was very concerned. i had seen brad in my house and he was agitated that week. related to the painting. >> as a marriage gone bad, it's hardly proof of murder. nor was brad's conspicuous absence from her memorial service, nor his apparent lack of interest or cooperation as the police sought in the murder investigation. these were suspicions. but there was no physical evidence linking brad to the crime. the prosecutor would say it was because he cleaned the he covered his tracks well. but there it was. what was the best evidence against brad? ironic, perhaps, given the defendant's particular expertise. >> we knew we had this fabricated alibi we needed to address. >> reporter: the issue was the phone call the morning nancy brad's cell phone registered a call from home at 6:40 a.m. when he went back to the store. proof, surely, that nancy was alive at unless, that is, unless brad placed the call himself. brad, the world-class expert in internet phone technology. >> if anyone could do that, it was the defendant. ultimately, he had the potential to make that phone call. >> in testimony that was, frankly, mind numbing. >> that leverage is something called either tappy or j tappy. >> reporter: an expert from cisco, brad's former company, explained about ten different ways someone as accomplished as brad could have remotely made that call. >> the main ways to do it are using a computer where you can program something into your computer and delay it so that a phone call can be made from your computer from the computer's modem. >> to do that, brad needed a certain router. one prosecutor said conveniently disappeared from the cooper home. >> we know he had this router. >> in fact, said the prosecution, this cisco chat log proves brad borrowed that router, the 3825 it's called, took it home, months before the murder. >> you know that defendant had one of those two 3825 routers? >> that's correct. i only had two. >> and you never got that 3825 router back? >> no, sir. >> cisco doesn't have it back, where did it go? we know it was never returned. >> but it was brad's own computer examined by the fbi which coughed up the most accusing evidence of all. evidence he had already lied under oath. >> the kid fell asleep about 9:00. i probably fell asleep soon after. >> reporter: in his deposition, brad said he was asleep with his daughters when nancy came home from that party friday night. but brad's computer said otherwise. he was online, until about midnight when nancy came home. >> he's been awake on his computer and when she comes in shortly after midnight we think they argued and that a fight ensued and that's when he strangled her. >> and then? the closest thing the prosecution had to a smoking gun. a google map brad typed in the numbers 27518 the zip code for cary and zoomed in to the exact location where nancy's body was found. when did they claim he did this? 1:15 in the afternoon on friday, july 11, the day before nancy went missing. but proof of intent? maybe, maybe it wasn't much of a search. it lasted just 41 seconds. >> he didn't look anywhere else. generally you search a whole bunch of different places and this is one place and it's only 41 seconds long. >> i don't think it would take very long if you look at the mapping, you immediately recognize this desolate area, this beige area in a sea of green and then zoom into it, zoom into it, zoom into it and see where it is. >> reporter: of course, every prosecution has its flaws. and this one, maybe said the defense, they didn't have the right man at and maybe they didn't know nancy so well either. >> dateline returns after the break. break. break. voltaren, the joy of movement. why hide your skin if dupixent has your moderate-to-severe eczema, or atopic dermatitis under control? hide our skin? not us. because dupixent targets a root cause of eczema, it helps heal your skin from within, keeping you one step ahead of it. and for kids ages 6 and up, that means clearer skin, and noticeably less itch. hide my skin? 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>> there was talk she was going to jog and she would be back by then. >> there were people who claim they saw a woman they believed was nancy running and it was proof, the defense says, that she was alive that morning. >> she was about 5'9", good shape. >> this witness said she reported her sighting to the police after she saw nancy's missing poster. >> how is it that the next day when you saw the flyer, you believed it was her? >> because she was so close to me and she had an elongated face. that's what drew my attention. >> she wasn't the only one, this man said he got a 30-second look at her as he was driving to work. >> i saw a lady jogging on the right-hand side of the road. jogging towards the bridge. >> but did the police follow up? not for a long time, said these witnesses. >> they ignored everybody that believed they saw nancy for three months. >> same with those suspicious vans, said the defense. >> it was clear that the police had focused on brad to the exclusion of other people. >> it wasn't just brad who had been unfaithful. implied the defense. could someone else have wanted to silence nancy permanently? someone suggested the defense like john pearson who at first didn't tell the police about an indiscretion with nancy. he said he held back to protect his family. it happened after a very tipsy halloween party back in 2005. >> she began taking her clothes off, i took my clothes off and we, i believe started to have sex. i believe we stopped and got dressed and decided to never speak about it again. >> it seemed to observers as if you two were somehow blaming the victim? you were looking for other people she may have had relationships with. why was that important? >> the reason that people looked to the spouse first, is because affairs of the heart frequently lead to crimes of passion. so, anyone with whom she had a relationship, should be the subject of a police investigation. >> and there may have been other secrets, the defense charged, clues to nancy's life they'll never know because, and this was big, a cary detective erased the contents of her blackberry accidentally, said the nonsense, said the defense. >> it's not something that happens accidentaly. >> a prime example, the defense said, of shocking allegations that the police investigation was dishonest. why would the police have any motivation whatsoever to get rid of evidence in this case? >> not only did they start with an eye towards building a case against brad, they also started with an eye toward attempting to preserve nancy's reputation. and that phone would carry e-mails, text messages, pictures, videos. >> you think it would have been exculpatory evidence for your client? >> i don't know what it was. because we never did get in that phone. >> and that call saturday morning from brad's house to his cell phone, the one the prosecution allege brad actually made himself with that now missing they claim that he checked out a router and never returned it. >> the question is, did he generate a phone call. not did he have the technological skill. they also took photographs of the they searched the house. and they have not once introduced any evidence that the router was in the house. >> hard drives don't lie, or do they? that was the question the defense raised when it came to those apparently damming results of the fbi's search of brad's computer. >> you're talking about a computer that we know was tampered with. >> you're alleging what? >> i'm not alleging. i'm stating as fact the computer was tampered there were significant anomalies that we found in the computer itself. >> meaning, he says, that brad's computer was hacked. the 41 second google map search was planted. the prosecution had no smoking gun. so you're saying he didn't even search for that map? >> that's right. >> somebody else put it on his computer? >> yes. >> an fbi agent had testified that he saw no evidence of tampering, but the defense said, it had experts who did. two of them. both of whom wrote reports. but, trials have referees and in this case, the judge ruled that neither one of those defense experts could testify about tampering. one, said the judge, wasn't sufficiently qualified, the other brought in too late in the trial. but, even if they had testified, there was one question they couldn't answer. if there was a hacker, who was it? >> i can tell you that police had access to it. i can tell you that anybody within wireless range had access to it. >> what possible reason would the police have to put that map on his computer? >> i can't say that the police put it on the computer. i don't know who manipulated the computer. what i can say is, that a possible reason is if you believe somebody's guilty and that you don't have any evidence against them, well, it's perfect evidence. >> reporter: could those 41 seconds put brad cooper in prison for the rest of his life? >> dateline returns after the break. break. break. trelegy for copd. 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the defense charged the police more than dropped the their investigation was dishonest. the erasing of nancy's blackberry, for one thing, had to be intentional, said the defense. nonsense, applied the prosecution. besides, they claim, they already found what they needed from that phone through other sources. >> we had her phone records. we knew everything she had done. we had the billing to know how much texting she did or didn't do. we knew her friends. >> the idea the police might have inserted the google map search on brad's computer, they couldn't have, said detective daniels. >> none of the people that work for me or work in the department would have had the knowledge to go in and do something like that. >> reporter: the defense charged that police ignored those possible sightings of nancy and mysterious vans for months. >> the defense was thinking that jury wasn't listening. the police indicated that they followed up with every one of those people. >> as for john pearson, whose indiscretion with nancy should have made him a suspect, at least according to the defense, he had an alibi. on that friday night, pearson spent the night with heather. very same woman behind brad and nancy's breakup. >> at the beginning of the case -- >> still, as the long trial finally wound down, the defense hammered home its claim that the police and prosecution bought into a whispering campaign when nancy's friends against brad. >> it made it easier for them to simply let the gossip about brad became their reality, even when the facts and the evidence did not fit it. and now, the police department and the prosecutors are willing to send an innocent man to rot in a dungeon in essence for the rest of his life. >> but there were facts said the prosecution to send brad cooper away. >> fact, the defendant googled where he was going to place his wife's body. fact, the router that could help him automate a phone call is now missing. fact, nancy cooper never left that house the morning of july 12th. >> so, the jurors adjourned to deliberate. guilty of first-degree murder, second degree or not guilty? and nancy's family, having listened to weeks of confusing circumstantial evidence, worried. >> if i was hearing this for the first time, would i feel comfortable sending someone to prison for the rest of their life? >> the jury stayed out for two days and then -- >> has the jury reached a unanimous verdict? >> yes, sir. >> the verdict of the jury reads, we the jury by unanimous verdict find the defendant, bradley graham cooper, to be guilty of first-degree murder. >> i cried for hours. >> i cried for hours. relief, yes, it's over. there's a conclusion and it's justice for nancy. now we can all go home. >> and brad? >> obviously brad was upset, but he knows and feels this is not over. >> reporter: in 2013 an appeals court overturned bradley cooper's conviction deciding the judge should have allowed mere defense testimony regarding the laptop a new trial was ordered. but while awaiting his second trial, cooper pleaded guilty to second degree murder and wutz sentenced to approximately 12 to 15 years. and nancy? there's a black granite bench in the cary park the place she once ran, her adopted town's way of remembering. the cooper girls bella and katey are growing up in canada with nancy's twin sister and her husband jim. their cousins were with them the day we came to call. and for the adults, bittersweet. >> so sad nancy's not here seeing >> absolutely, that's the tough part for me. >> what do they understand about mother and father? >> we told them that mother nancy was killed by a bad man, but she's in heaven and the man went to prison. >> tell them the tragic story of a man and woman who sank in the undertow of what once was love. >> we got an outcome that nancy deserves, but it's not also a winning hand for everybody and brad lost his life as well. there's many things that were lost, lives that have forever changed >> i'm morlnatalie morales. >> and this is "dateline".? she was an amazing mother, everything that we hoped would be true -- i just remember thinking that this can't be happening. >> why would this happen to her? because someone she met that night, was it someone she knows? >> there was some blood, on some tissues, there was a sweatshirt, she started crying >> this is so -- long >> there isn't no way, that he could do

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