Episode Details

When a young mother, Joann Katrinak, and her infant son, Alex, vanished from their Pennsylvania home just days before Christmas in 1994, the investigation yielded few clues and quickly went cold. For years, the mystery seemed unsolvable—until a revolutionary forensic tool entered the picture. This is the story of one of the first cases in the United States where DNA evidence was successfully used to convict a killer, creating a landmark precedent. Unravel the mystery alongside the FBI's greatest law enforcers and forensic scientists as they return to the evidence with new technology, using a single hair to build an unassailable genetic case and finally bring a relentless predator to justice for a crime that had long been silenced.



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