The 1987 manhunt for serial killer Darren Dee O'Neall. Unravel the mystery alongside the FBI's greatest law enforcers and forensic scientists.

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Season 3 Episode 5: When authorities in a small Washington town began investigating the disappearance of a young woman, they had no idea it would turn into a nationwide hunt for a sadistic predator. The FBI was called in to help track down Darren Dee O'Neall, only to discover that other unsuspecting women across the Pacific Northwest had fallen victim to his charms.

The FBI Files is an American docudrama that takes a look behind the scenes of the Federal Bureau of Investigation's crime laboratory.

Real FBI cases are recounted through reenactments and interviews, due to the sensitive nature of the show, viewer discretion is advised.