Clifford Olson
Clifford Olson (January 1, 1940 – September 30, 2011) was a Canadian serial killer. He killed at least 11 kids and teenagers in British Columbia, in the late 1970s. He was convicted of the crime, and from to he 1980s, he spent his life in prison. In the 1990s and 2000s, requests for parole were denied. Olson died of cancer in 2011.