David Richard Kaczynski is an American charity worker. He is the younger brother of the domestic terrorist and mathematician Ted Kaczynski (1942–2023), also known as the Unabomber.
Kaczynski in 2008
Theodore John Kaczynski, also known as the Unabomber, was an American mathematician and domestic terrorist. He was a mathematics prodigy, but abandoned his academic career in 1969 to pursue a primitive lifestyle.
Kaczynski after his arrest in 1996
Kaczynski's birth certificate and several of his driver's licenses
Kaczynski's diplomas from Harvard University and the University of Michigan
Kaczynski as an assistant professor at UC Berkeley in 1968