Theodore Kaczynski, the man the media dubbed the Unabomber, died Saturday in a federal prison at 81 after terrorizing the nation for nearly two decades by sending victims homemade bombs until he was caught in 1996. His own writings and brother suggest that his tilt toward violence started while studying at the University of Michigan.

“When Kaczynski entered the university, he was a precocious, solitary mathematics student whose brilliance his undergraduate education at Harvard had not yet revealed,” Karl Stampfl wrote in the Michigan Daily, adding that by the time Kaczynski left, “he’d developed an identity with a different name. He was the Unabomber.”

The report, “He came Ted Kaczynski, he left The Unabomber,” was based, in part, on a letter and unpublished autobiography that Kaczynski sent the university’s student-run newspaper.

The Michigan Daily mentioned Kaczynski’s dissatisfaction with his professors, what he considered low academic standards, and his experience in an Ann Arbor “rooming house.” Kaczynski became “convinced his landlord had turned others against him,” and disdained others and showed “little willingness to communicate with peers.”

Kaczynski, the 2006 report added, was “tormented by the sounds of a couple having sex through the thin walls” at the house where he was living. He “reported the sounds to the university, which, of course, took no action.” He began to have nightmares, the report added, and grew “angrier and angrier.”

The Michigan Daily described visits to a psychiatrist and suicidal — and then homicidal — thoughts. It was during that time, Kaczynski later told a psychiatrist, that he decided he would spend his life killing. It would take another decade before he acted on those thoughts.

‘The most miserable years’

Obituaries published Saturday in outlets nationwide, summarized Kaczynski’s early life, his violent and deadly acts of terror, and the search for him, what some consider one of the most enduring and costly manhunts in American history.