On April 3, 1996, the FBI arrested Theodore Kaczynski, a 53‑year‑old former mathematics teacher, at his remote cabin outside Lincoln, Montana, in connection with the Unabomber bombings that had terrorized the nation for nearly two decades.
Sources told CBS News that agents searched Kaczynski’s home with a warrant and found items investigators had long linked to the Unabomber: a typewriter and manufacturing tools similar to those used to build the explosive devices. Kaczynski, who had lived alone in a primitive cabin, reportedly showed little reaction when agents told him they wanted to speak with him.
The Unabomber investigation traced 16 explosive devices to a campaign of terror spanning 17 years. The bombs killed three people and injured more than 20. Investigators say the first attack occurred in 1978; later incidents targeted universities, airline companies and individuals involved in technology. After a lull of several years, the campaign resumed in the early 1990s with deadly results.
The arrest followed a tip from Kaczynski’s own family. According to law enforcement sources, relatives who had become alarmed by material they found contacted the FBI through an attorney and provided printed documents and other evidence that implicated Kaczynski. FBI agents then focused on his Montana property, conducting surveillance that included ground teams and aerial observation and using electronic sensors to monitor activity.
Kaczynski’s background drew attention: a Chicago native and Harvard alumnus who had earned a doctorate in mathematics and taught briefly at the University of California, Berkeley, before abandoning academic life in 1969. He moved to a remote setting where neighbors described him as a loner and a frequent library patron.
Investigators said they were especially interested in establishing Kaczynski’s whereabouts during years when some bombs were sent, a difficult task that largely hinged on evidence recovered at his residence. Over the course of the case, agents worked with forensic specialists to match bomb construction methods, materials and a distinctive typewritten style to a single suspect.
The arrest came after an intensive, high‑tech manhunt that included long‑term surveillance. Law enforcement sources indicated Kaczynski had been monitored for weeks before the search of his cabin. Officials planned to arraign him in federal court in Helena and hold him in the county jail pending further proceedings.
The Unabomber’s profile sharpened in 1995 when a 35,000‑word manifesto criticizing modern technology and industrial society was published; its appearance helped generate leads and public debate about how to respond to the demands of an anonymous bomber. The manifesto, combined with forensic evidence and the tip from family members, ultimately led investigators to Kaczynski.
At the time of his arrest, Justice Department sources said Kaczynski had not yet been formally charged in court. Authorities emphasized that the suspect, like anyone else, was presumed innocent until proven guilty. The capture marked the possible end of one of the longest and most resource‑intensive manhunts in U.S. history.