Serial Killers That Pushed the FBI To Their Limit | Ultimate FBI Files Marathon

This gripping true crime marathon plunges into the terrifying cases of three of America's most chilling serial killers: Robert Hansen, "The Butcher Baker" of Alaska; Larry Jean Bell, the taunting abductor of South Carolina; and Christopher Wilder, the deadly, cross-country "Modeling Photographer."

Watch how the FBI's Investigative Support Unit (ISU), led by profilers like John Douglas, worked with local law enforcement to map the criminal mind and bring these predators to justice. The cases detail the harrowing disappearances, the challenges of evidence collection in remote and complex locations, and the critical role of surviving victims (like Cindy Pollson and Linda Grober) and forensics (like the ESDA machine used in the Bell case) in closing in on these seemingly respectable members of society.

From Hansen's chilling hunting ground in the Alaskan wilderness and the psychological games of Bell with the Smith family, to the desperate cross-country chase for one of the FBI's 10 Most Wanted Fugitives (Wilder), this special chronicles the relentless pursuit of justice for their many victims.

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