The Unabomber case was one of the Federal Bureau of Investigation’s costliest investigations. Ted Kaczynski, known as the “Unabomber,” was born on May 22, 1942, in Illinois. A mathematics prodigy, Kaczynski taught at the University of California at Berkeley before retreating to a survivalist lifestyle in the Montana woods. Between 1978 and 1995, Kaczynski mailed bombs to universities and airlines, killing three people and injuring 23 more. FBI agents arrested Kaczynski in 1996, and two years later he was sentenced to life in prison. Before Kaczynski’s identity was known, the FBI used the title “UNABOM” (UNiversity & Airline BOMber) to refer to his case, which resulted in the media calling him the Unabomber. The following are OSINT images made public by various sources and are used under fair use for educational and research purposes only.