here is josh mankiewicz with lauren's promise. >> ♪ >> graduation at the university of utah in salt lakeity, home . it time for selfies. smiles. celebration. in may 2019, 8500 graduates and their families packed the university's huge arena. lauren mccluskey should've been here too receiving her degree in cap and gown as happy as her classmates. except, she was not. the story of what happened and why is as sad as it is eye- opening. >> this was not one of those things that it was out of our bones control. >> how many times do women have to call for help before the university of utah realizes, you know what? we've got to stop this up. >> what are the two of you thinking at that point? >> i couldn't fathom what happened. >> neither of us slept that night. >> it's a story that could have ended differently. if just one person had stepped up. if one more phone call had been made. 1.connected. instead, the repercussions of a preventable murder would continue for years to come. lauren grew up in a college town of pullman, washington. her parents both professors. from early on, lauren was a girl

here is josh mankiewicz with the trail of trust. >> snethern california's south bay.singularly stunning strand of shoreline with familiar names. josh mankiewicz: this seaside playground we call it we call it the sandbox. >> people don't think the success but it does. >> this playground is lined with beachfront properties worth millions. nestled among the small beach towns is an oasis called el segundo. >> it is main street usa. >> a great place to raise kids. >> in 2003, one of the rainmakers in the real estate business selling this beautiful homes in ■çel segundo and the south bay was a woman named julia, known as deede. >> she embraced everyone that came into her path. >> her best friends, mortgage executive and a real estate sales partner linda. she was good at her job. >> i loved working with deede. >> she was easy to like and always wanted the best for everybody. her clients were loyal over the years. >> deede was loyal not only to her clients but as a divorced mom to her children, mike and julie. >> i remember my mom explaining to me that as you get older, proba

josh mankiewicz: holidays and birthdays came and went.with her daughter and grandson >>> holidays and birthdays came and went. danya herroz spent time with her daughter and grandson at the cemetery. >> hi, my angel babies. >> she wasn't close to being able to move on. >> i'm sorry. i didn't protect you. >> but police had moved on. daniel moen was no longer a suspect. investigators were now focused on moen one. the prime suspect continued to live at home with his parents and an fiance and spent much of his time with the man who was his alibi for the murders, max corn, his best friend. they even got matching tattoos. lieutenant kevin roney and his team kept working the case . when his cell phone records finally came in, detectives were able to see how tori's last day had taken shape. >> what did you learn about what tori's plans were for that evening? >> it was her belief that dennis had made reservations at george's at the cove, a very nice restaurant in la jolla. she had arranged for a sitter that she was going to drop dane dean off to. t

here's josh mankiewicz with broken bonds. >> what would you do for your family? would you like?u walk through fire? could you ever accuse them of something terrible to save yourself? this is the story about two very different families. it's about loyalty, terror, deception, and love. and for one of the families, it begins with a late-night phone call. >> i was about to not answer it, and something told me to rc pick up the phone. >> christina's mother was on the line. >> you can hear the sirens, and she kept saying, you have to come here. they broke into the house and he is dead. they killed him. >> he was joseph morrissey, who had been married to christina's mother, kay, for 12 years. their suburban florida home, documented by police video, was now a crime scene. >> there was so much chaos going on. there was tons of police cars and sirens and you can smell the smoke and i just remember running down the street and the police officers were trying to stop me. i kept going and she was just standing there in the middle of the street, and she just looked so small and so hurt. i just

josh mankiewicz: chacey poynter had just witnessed her husband being shot.he could barely breathe. >>> chacey poynter had witnessed her husband being shot. she could barely breathe. >> slow your breathing down. concentrate on that. >> even as she was getting hooked up with oxygen, the officer needed to speak with her while everything was fresh in her mind. his body cam was rolling. >> tell us what happened? >> chacey told me she was on her way to meet bob at the local jack-in-the-box. >> when he texted me, i told him i was three miles away. >> their daughter addison was at a friends house so it would just be the two of the. >> he texted me. when he texted me, came around the curve, and i went up the road. >> chacey still visibly shaken sitter jeep got stuck on that muddy road. bob, already at the jack-in-the- box, drove out to help her. when he got there. >> he said i don't think i can make it down the road. we walked up here and we walked back back to my jeep. >> she said bob jumped in the driver's seat and pulled her jeep out. >> i was standing at the back

josh mankiewicz: he once wore number 32. >>>w, he wants war number 32. now o.j. and for the next 15 months, a new home. a cell at the l.a. county jail where he was being held without bail. simpson had visits from his family, friends, attorneys. and even his former colleague costas. >> i went to visit him and he tried to convince me several times of his innocence. he knows -- when i leave the club behind? what i do something like this? this doesn't make sense. that doesn't make sense. >> but simpson was facing a mountain of evidence. as district attorney gil garcetti confidently told nbc news back in 1995. >> no case that i am aware of in the history of this country has had so much dna evidence. but for the fact that if it were o.j. simpson , it is what you call in the sports language, a slam dunk winner. >> thing d.a. garcetti made a decision and decided to move the case here to downtown los angeles from santa monica. downtown, the jury pool would be mostly minority and thought to be more sympathetic to a black defendant. at the time, garcetti claimed it was made

dat josh mankiewicz: after the show was over that first night, jones insisted the reporters return tore he'd arranged for them >>> after the show was over that first night, jones insisted the reporters returned were he arranged for them to sleep at a local bar. there would be little rest while the nbc crew had a nightcap at the bar the print reporters were approached by a local constable who wanted to talk about jonestown. >> he said that on multiple occasions there were people who were evacuated from jonestown after receiving injuries. he felt that some of them have been beaten. he described a pit, a deep hole in the ground that people could not climb out of. you will be placed in it for punishment. >> the next morning harris showed them the note he had gotten the night before. >> he rolled down his combat. in there with a white tablet note about that big that said: please help us get out of jonestown. >> by the time the newsmen pass through the gates later that morning they were no longer a collection of rivals. they were a team. >> i think i said let's each of us stand out and each

here is josh mankiewicz with secrets from the grave. >> wander through any graveyard and you will find them, mysteries etched in stone. lives cut tragically short by war, disease, misfortune and sometimes murder. many who rest in these peaceful places took secrets to their graves. but, some here are merely waiting, waiting for someone to take interest and ask questions, and as you are about to see, the dead can be exceedingly patient. our story begins on a frigid march night in 2009 with a house fire in stow, ohio. that fire was important, not for what it destroyed, but for what it illuminated. >> 911, where is your emergency? >> there is a fire. >> a house or what? >> the house. >> the caller was a 16-year-old girl who told the 911 operator that she, her parents, and her younger brother had all escaped, but barely. and then, her father took the phone. >> i don't really understand. the entire front of our house is just engulfed. >> okay. i'm glad everybody got out. >> that deb was scott purk. you will be hearing a lot about him. purk said his family had been sound asleep when he heard

here is josh mankiewicz with "a promise to helene. " >>> 40 years is a long time. that is 40 winters here in colorado, and countless snowfalls. it was on a day like this that a young woman disappeared. her name was helene, and helene had a friend named kimberly, a friend who kept her word. >> do you have any idea how many years you were signing up for when you made that promise? >> no. >> for those nearly 4 decades, kimberly latourette kept her promise. 40 years looking at faces, 40 years meeting with detectives, 40 years retracing helene's steps. >> when i make a promise and make a commitment, i follow through. >> helene never knew it, but she had another friend . >> you never met helene . do you feel like you know her? >> i do. i feel like i know her as well as i possibly could. >> shannon was 3 years old when helene disappeared and it was not until 2019 that she accepted a challenge. >> i wanted to win for helene. >>> helene brezinski grew up as the baby daughter in a close-knit family of five in hamilton, massachusetts . >> everybody that met her like her compa