here again is josh mankiewicz with "the quiet one." >> alex fazzino had lost his wife emily.despite his grief, he still had to be strong for his children. >> what did you tell your kids? >> i remember hugging them. i remember just telling them that mommy went to heaven and she can't come back. >> as two families mourned and said goodbye, alex had to come to grips with the fact that he was now a single dad with three kids under the age of 7. >> it's sickening to know that if emily would have got the help she needed, she could still be here for my kids. and probably for me. >> while emily's family tried to cope with their loss, state investigators dan schnitker was operating under the assumption that her death was linked to her drug problem. >> she had an addiction to prescription pills. >> an overdose would mean no crime. just a regrettable accidental death, or even a suicide. but then six weeks later, something that changed the entire focus of the investigation. emily's toxicology report came back. >> results came back clean. she wasn't under the influence of opiates at the t

here's josh mankiewicz with "deadly exchange." >> reporter: it's a dilemma that confronts every teenagerhow to simultaneously fit in with your friends and rebel against everyone else. that two-step is made a little easier by the knowledge, maybe the certainty, that you're going to live forever. >> kids do dumb stuff all the time. >> reporter: and so sneaking out of the house in the dead of night to meet other teenagers to drink, party or just hang out well, that's nothing new. usually teens sneak back home safely. this wasn't one of those times. >> i thought it was some kind of, like, joke. i just couldn't believe it, really. >> i was just freaking out. like, it can't be. it can't be. >> reporter: it was last april 2014 when two bright foreign exchange students living in montana, slipped out of their home. >> he's lying face down. he's barely breathing. >> reporter: just minutes later, their amazing american adventure came to a sudden and tragic end. >> where is he bleeding from? >> everywhere. >> it was horrific. >> no one ever knew that someone would die over it, you know? >> it was ju

here's josh mankiewicz with "troubled waters." >> reporter: if you crave money or fame or if you want to meet beautiful people, maybe even become one of them, you will find your way to southern california. it's where everything is possible or seems to be. this is the story of two women drawn for different reasons to the sun, to the bright lights, to the blue water. both chased that promise of success. both saw what can go wrong. it was a gorgeous summer day in newport beach, california. the last of fourth of july weekend. some lucky tourists aboard an eight-passenger boat called "the green machine" were marveling at a school of dolphins playing in the water when they came across the unexpected. >> we've got a loose boat out here about five miles out of newport beach. >> reporter: the captain radioed the coast guard that a small speedboat was circling out of control n the water nearby was a man holding on to a body board. >> the husband apparently fell off the boat and the wife apparently fell off the boat. >> reporter: the man in the water was frantic. >> he's still looks like he's pr

here's josh mankiewicz with "mystery in orange county." >> orange county, california. on tv, it's a place of sun, fun and privilege. it's where the real housewives first aired their dirty laundry and where the kids from o.c. showed us all what temperature cool really was. around here you get a sense everyone is rich and white and lives in a mansion with a view of the pacific. but step back from the coast and you'll see the orange county that isn't on tv, not as wealthy, not as white, full of those who came here from somewhere else, chasing a better life and finding it in places like santa ana, a mostly working-class immigrant community in the shadow of disneyland. it's the part of the o.c. where people know that to survive, they'll have to work hard. maribel ramos arrived here as a baby, leaving mexico behind. she would not only survive here, but thrive. to tell you the truth, this should be the story of a woman who worked hard to change her life, and in doing so, carved a path for others to follow. >> hello? >> but this story is going to end differently. >> why are yo

here's josh mankiewicz with "missing marie." ♪ >> secrets. we all have them. some are small.ome large. some professional. others very, very personal. this is a story about secrets. about a woman who was very good at keeping them. and about what happened when that woman suddenly disappeared. >> she was beautiful. my mom was really beautiful. a great person. a nice person. >> as a little boy, marcus singleton couldn't possibly foresee the loss he would suffer or the terrible choice he would one day have to make. all he knew back then was his mother's love. >> i mean, she helped people, you know, if there was a kid in the street who needed something, she would pull over and see if they were okay, you know, she was -- she was that type of person that taught me to basically put others before myself first. >> marie was single when she had marcus. he was the center of her world. kelly clayton was marie's hairdresser and good friend. >> she talked about him a lot, the things that he was doing in school. she got really excited about marcus. >> marie's friends and co-workers bridget ha

here again, josh mankiewicz. >> it had been about a year since marie singleton's body was found in the trunk of her car at a los angeles beach. her son marcus, 8 years old at the time of her murder, was being raised by an aunt in philadelphia. but his mother was never far from his mind. >> we used to have a debate about who loved each other more, you know, i love you more, no, i love you more. no, i love you more. and sometimes i even go to sleep and i still say it, like, mom i love you more, you know, it's -- that's the kind of stuff a kid never forgets. >> he also stayed in touch with marie's husband, andre jackson. you still felt a connection to him. >> yes. he was my dad. you know, that was the only father i had, and i missed him. >> meanwhile, the rest of marie's family wondered if andre knew more about her death than he was saying. they believed police had those same questions. but andre had never been arrested. and then came that letter, which changed everything. handwritten or typed? >> it was typed. >> the unsigned letter read in part, "it is very unlikely that the individual

here's josh mankiewicz with "missing marie." ?? >> secrets. we all have them. some are small. some large. some professional. others very, very personal. this is a story about secrets. at keeping them. and about what happened when that woman suddenly disappeared. >> she was beautiful. my mom was really beautiful. a great person. a nice person. >> as a little boy, marcus singleton couldn't possibly foresee the loss he would suffer or the terrible choice he would one day have to make. all he knew back then was his mother's love. >> i mean, she helped people, you know, if there was a kid in the street who needed something, she would pull over and see if they were okay, you know, she was -- she was that type of person that taught me to basically put others before myself first. >> marie was single when she had marcus. he was the center of her world. kelly clayton was marie's hairdresser and good friend. >> she talked about him a lot, the things that he was doing in school. she got really excited about