The remote Montana cabin where FBI agents arrested Theodore Kaczynski in April 1996 continues to serve as a preserved artifact at the bureau's headquarters, nearly three decades after the end of one of the longest manhunts in U.S. history.

Kaczynski, known as the Unabomber, was captured on April 3, 1996, at his primitive one-room cabin near Lincoln, Montana, concluding an 18-year investigation into a series of mail bombings that killed three people and injured 23 others between 1978 and 1995.

The cabin, which served as both Kaczynski's residence and bomb-making facility, was transported to FBI headquarters following his arrest. The structure contained evidence crucial to his prosecution, including bomb-making materials, journals, and the original manuscript of his anti-technology manifesto.

Kaczynski's case became notable not only for its duration and impact but also for the breakthrough that led to his capture. His brother David contacted authorities after recognizing similarities between the Unabomber's published manifesto and Theodore's writings and beliefs.

The preservation of the cabin reflects the FBI's practice of maintaining significant artifacts from major investigations. The structure represents a complex piece of American criminal history, documenting both the investigation techniques of the era and the physical evidence that helped secure Kaczynski's conviction.

Kaczynski pleaded guilty in 1998 to avoid the death penalty and received multiple life sentences without the possibility of parole. He remains incarcerated at ADX Florence, a maximum-security federal prison in Colorado.