The family of Sherri Rae Rasmussen, who was murdered in 1986, is calling for a probe into the Los Angeles Police Department's original investigation.

Jamie, a graduate of the University of Michigan, moved to Phoenix and got a high-paying job in medical sales. When she joined a local university alumni group, Jamie fell for a handsome young member named Bryan Stewart. The couple dated for a year and lived together for two. Then Jamie went missing. While searching for her, detectives found evidence that Bryan had been lying to Jamie, and police, about who he is. Bryan is actually Rick Wayne Valentini. Ten years ago he changed his identity illegally, and moved from Michigan to Phoenix to "start over." But the life he left behind led detectives to suspect that Bryan is more than just a con man. In his only interview, the man who insists he is Bryan Stewart talks with 48 HOURS MYSTERY correspondent Erin Moriarty about changing his name, his relationship with Jamie and his claim that he helped her disappear. The broadcast also features exclusive interviews with Jamie's family and friends, Bryan's aunt and daughter, and lead investigators in the case.

"For anyone who really believes, as you're supposed to believe in America, that you're innocent until you're proven guilty, please, take a look at the evidence, or in this case the absolute complete lack of evidence, and don't rush to judgment," he asks. "This is not CSI or Law and Order' or any of those shows where at the end we have a satisfying resolution. I doubt that there will ever be a satisfying resolution for this because the evidence is gone. Even if I do manage to get off, I don't know if Monica's killers will ever really be caught.".

Troy Roberts reports on the case of Pvt. John Needham, a decorated soldier who was Medivac-ed from Iraq and later diagnosed with traumatic brain injury (TBI) and post-traumatic stress disorder (PTSD). Investigators say John beat his 19-year-old girlfriend to death with his bare hands - and while John took responsibility for Jacque's death, he remembers little of the crime, recognizing only that something inside him snapped. 48 HOURS MYSTERY explores the murder of Jacque Villagomez, as well as whether John's TBI and PTSD might have played a role in her death.

Multi-millionaire entrepreneur Bill McLaughlin was living the good life in Newport Beach, California, when he was shot dead in his home. This Saturday, 48 HOURS MYSTERY explores the deadly love triangle that may have led to the death of McLaughlin, a murder that rocked this wealthy and glamorous community more than 15 years ago. The broadcast will investigate the story behind McLaughlin's death, including the suspected roles played by his fiancée Nanette Johnston, and former NFL linebacker Eric Naposki, who speaks to 48 HOURS MYSTERY in his first on-camera interview. McLaughlin was a devoted father and family man, who, following a 1990 divorce, began seeing and ultimately became engaged to a much younger Nanette Johnston who was later discovered to have a habit of seeking out wealthy men to date. Following McLaughlin's death, Nanette was questioned by police, but she had an alibi. However, the would-be Orange County housewife had a shocking secret that would soon be revealed: her relationship with former NFL linebacker Eric Naposki, who had his own plans of marrying Nanette. But police never had enough to bring this case to justice. Now, finally, a family and a community will get the answers to who killed Bill McLaughlin.

Correspondent Peter Van Sant has covered this dramatic case through the years from Perugia, Italy, and has now followed Amanda and her family to Seattle. His report reveals details of the cruel manipulation and sexual intimidation Amanda endured while behind bars, in her own words, from a letter that she wrote. She said a high-ranking prison administrator ordered her into his office alone, at night, to talk about sex. Amanda eventually came to believe that the administrator's real motive was to intimidate her and provoke her to say something that would support the prosecution's theory that she really was a sex-crazed killer.

Correspondent Erin Moriarty reports on Gatti, the ultimate blood-and-guts warrior, who won three world titles, including welterweight champion. A multi-millionaire known for his legendary trilogy of fights with Mickey Ward, Gatti's professional fights were nothing compared to the shadows he faced outside the ring. Two years after retiring, did Gatti kill himself, or was it murder?.