The BTK Killer, Dennis Rader, evaded capture for 30 years, taunting police with chilling letters. His reign of terror seemed endless, until he made a fatal mistake. In 2005, BTK sent a floppy disk to a local TV station, believing it was a safe way to communicate. He thought he was too clever for investigators, but overlooked one tiny detail. Hidden on that disk was metadata from a deleted document, revealing "Christ Lutheran Church" and "Dennis." This digital breadcrumb was the exact clue police needed to finally identify and arrest him. This story reveals how even the most cunning criminals can be undone by simple oversights and the power of persistent, evolving investigative techniques. If you're fascinated by the psychology of serial killers and forensic breakthroughs, this is a must-watch.

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