here's josh mankiewicz with "mystery in orange county." >> orange county, california. on tv. it's a place of fun, sun, and privilege. it's where the real housewives first aired their dirty laundry and where the kids from o.c. showed us what 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 you crying? >> because i'm

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." >> 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. >> the captain raid owed the coast guard that a small speedboat was circling out of control in the water nearby, and a man was holding on to a body board. >> the husband apparently fell off the boat and the wife apparently fell off the boat. >> the man in the water was frantic. >> he's still looks like he's pretty distraught. >

here's josh mankiewicz with "the quiet one." >> sometimes the fresh air of a small town can hide a lotf dirty laundry. >> my worst fear was all of a sudden true. >> sometimes sudden death with lay bare every secret. >> she had felt like she was abusing it. >> what happened in this small do town would tear apart a marriage, and at the same time, separate two families that were once north of des moines, is a company town, headquarters for one of the largest grocery chains in the midwest, fairway. it's a family owned company and rick beck with is a family ceo. he and his wife raised a family of five, their youngest daughter emily. the sweet but quiet one. >> a shrinking violet? >> the older sisters said she never got spanked. >> she didn't. just remain silent and look at me with those big brown eyes and it was over. >> even though emily was from a prominent wealthy family, her friend said she never flaunted it. >> everyone knew that emily was a beckwith, but i never felt less in her presence or anyone in our family. >> emily was the girl ev every boy wanted to >> could have any boyfriend.