4 of 20: Motive and Haste

Original detectives on the case remember tracking down 17-year-old Jeff Pelley at a theme park in Illinois and Delia dissects the first videotaped interview authorities conducted with the teenager.

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Indiana police try to find physical evidence linking Jeff to the murders. Delia examines their methods and uncovers documents that contradict one another.

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Detective Danny Smith has solidified his theory on Billy Halpern's murder, revealing a direct link to organized crime that stretches far beyond the shores of South Florida. With this breakthrough, he's now prepared to present his case to prosecutors. Meanwhile, investigative jour ...  Show more

Justine and Holly ask an FBI profiler and a clinical psychologist their burning questions about Shelia and Rachel and the pathologies of juveniles who murder.

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Jeff recaps his prostate exam giving all the gory details, Jeff realizes Tamra and <a href="https: ...

Pam and Ed pour over the key testimonies of the three most important parties to consider the 24 hours surrounding the girls disappearance. The information provided over the course of the investigation contains clues that need to be pieced together. The team of investigators feel ...  Show more