here is josh mankiewicz with "the quiet one." >> sometimes the fresh air of a small town can hide a loty laundry. >> my worst fear was all of a sudden true. >> sometimes sudden death can lay bare every secret. >> she had felt like she was abusing it. >> what happened in this small town would tear apart a marriage, and at the same time, separate two families that were once united by love. boone, iowa, on flat land just north of des moines is a company town. headquarters for one of the largest grocery chains in the midwest. fareway. it's a family-owned company, and rick beckwith is a third generation ceo. he and his wife cindy raised a family of five here. their youngest daughter emily, the sweet, but quiet one. kind of a shrinking violet? >> the oldest sister said that she never got spanked. >> she didn't. she just remained 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 lisa says emily never flaunted it. >> everyone knew that emily was a beckwith, but i never felt less of a person in the presence of

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 again is josh mankiewicz with "stone-cold." >> reporter: in the days after nick's murder, his fianceeristy, was living in fear. >> jumped at every sound. i -- my family was scared for me. >> did he ever express any indication that some relationship that he had before was something that he was concerned about now in terms of his safety or your safety? >> no, and nick was my protector above all else. so i don't know that he would have said anything to me, not wanting to worry me. >> reporter: but perhaps there had been reason to be worried. detective garcia now spent some time charting the romantic geometry of nick's love life pre-kristy. >> it all comes back to their employment. they all worked at the same place, marana aerospace. nick had been dating jessica, very quickly began to date claudia. >> reporter: bob welsh, nick's friend and a client of marana aerospace, remembers how jessica reacted to the breakup. >> whenever nick was in the same room, there was no smiles out of her. i could tell it was not a -- not a good atmosphere between the two. >> nick ever say why they broke up? >>

let's return to josh mankiewicz to "troubled waters." >> reporter: to detective sean murphy, it soundedan suspicious. eric bechler taking up with a gorgeous redhead just three months after his wife was lost at sea. but murphy didn't have much more than a gnawing in his gut until his phone rang. >> we got a call from -- kobi's lawyer said he wanted to arrange an interview again with kobi. >> reporter: kobi laker, eric's best friend and volleyball buddy, he'd told sheriff's detectives the bechler marriage was great. now he had a different story. >> eric's told me on several occasions that he was sick and tired of his wife. he would tell me that he just couldn't take it anymore. he was tired of it. >> reporter: about seven months before pegye vanished, kobi says he and eric had a conversation that kobi describes as haunting him ever since. >> eric asked me about what he thought -- what i thought of the idea of him killing his wife. and i was pretty shocked and i didn't know what to say. he told me subsequently that he was thinking of taking her out to the ocean and dumping her into a barre

here again, josh mankiewicz. >> mike snyder had been missing for eight long years.he was. and the detective investigating the case had a hunch that mike's wife, ellen, was somehow involved. a co-worker of ellen's came forward, saying he had loaned ellen his gun and that when she returned it a few months later there were no bullets. >> he looked at it, he looked at her, he said, where's the bullets? >> ellen said she went to a gun range with a friend, who showed her how to use it. and detective wilson had discovered something else. ellen had actually tried to purchase another gun at a local pawn shop one month earlier. she was turned down after a routine background check. >> and you couldn't? what happened? >> it was a fraud charge. >> what did you do that got you in trouble? >> i was working for a company that i wrote a check on. >> it turns out that in the late '80s ellen had pled guilty tome bezelment. the charges were dropped after her probation. suddenly ellen snyder's skeletons were starting to see the light of day. and while detective wilson was doing his inve

here's josh mankiewicz with "jagged." >> reporter: there aren't too many places left in this countryhere you'll find americans still making the things americans use. one of them is this plant in northern ohio. inside these walls is where an astonishingly long and twisting trail began. by the time it ended, it had touched a shattered family, a stunned law enforcement agency and a surprisingly large collection of potential suspects whose names became known to all. often on "dateline" we tell the stories of families and detectives who find themselves bound together by the same murder, who end up working side by side toward a common goal, sometimes pursuing the same investigation from two different angles. and often each can wind up appreciating the efforts of the other. this wasn't that. at the center of this human cyclone of distrust is a young mom who worked in that plant. heather bogle worked overnights, one eight-hour shift after another. a single parent with a singular mission. >> her main focus was always her daughter. >> reporter: heather's younger sister, jen. >> she wasn't too

here's josh mankiewicz with the conclusion of "she didn't come home." >> the loyd groves defense team make their case to the jury. >> it was like you're playing cards and you have four aces, and you're waiting to play them. that's what we felt like over the last few years. >> george leply was one of two lawyers defending groves. >> i don't think there was enough evidence, and what evidence they did present had issues questioning whether it was reliable enough to justify taking the rest of a man's life away. >> for a defense team that had spent years reviewing police reports, one thing seemed obvious. >> when the police learned of something that implicated loyd, they were on top of it. whenever there was another avenue to pursue, it just kind of fell by the wayside. >> this was more about the police trying to prove that it was loyd groves that did this crime than it was about them trying to find out who killed kathy heckel if, indeed, she was killed. >> the defense argued the guitar man, dennis taylor, should have gotten a closer look. >> lesyes, she had an affair wi loyd. but she also

josh mankiewicz: how much money did he give anna? $46,000. is he some kind of sugar daddy?und, blood coming out of her mouth. jayshree bihari: who would do this to her? narrator: with so many men in her life,

josh mankiewicz: florida musician james huden was in the middle of an intense interrogation with detectivesigators thought would >>> florida musician was in the middle of an interrogation regarding russel douglas and then came the question investigators certainly thought would get his attention. >>> who is bill hill? >> he's a friend of mine who lives here. bass player. >> does that surprise you that i brought up that name? >> yes. >> why? >> uh, because you're from -- whidbey island? >> would it surprise you that i've been talking to him almost daily for the last week and a half? >> yeah, it would surprise me. >> i just wanted to see a reaction. up until that point he was playing it pretty cool, and i think i got the reaction i was hoping for. it kind of deflated him a little bit. >> it's truth or dare time, jim. you know what you told bill. he's your best friend in the whole world. the guy is falling apart over this, literally falling apart over the guilt he's carrying around because you told him what you did. >> i don't buy that for a minute. >> if revealing bill hill as their source was