The Unabomber

This entry is a duplicate of The Unabomber case, covering the same investigation into Theodore "Ted" Kaczynski, whose seventeen-year bombing campaign between 1978 and 1995 killed three people and injured twenty-three others across the United States. Kaczynski, a former mathematics prodigy and Harvard graduate who had retreated to a primitive Montana cabin, targeted universities, airlines, and technology companies with handmade package bombs that investigators struggled for nearly two decades to trace.

The FBI investigation — code-named UNABOM — was broken by Kaczynski's own decision to issue a public manifesto in 1995, which his brother David recognized as his writing. Ted Kaczynski was arrested at his Montana cabin in April 1996. He pleaded guilty in 1998 to avoid a mental illness defense he objected to, receiving life in prison without parole on multiple federal murder and explosives charges.

Kaczynski died at the Federal Medical Center in Butner, North Carolina in June 2023. His case remains one of the most significant domestic terrorism investigations in FBI history, demonstrating both the difficulty of identifying anonymous bombers and the decisive role that family cooperation can play in resolving cold cases.