Clifford Robert Olson, Jr. (January 1, 1940 – September 30, 2011) was a convicted Canadian serial killer who confessed to murdering 11 children and young adults between the ages of nine and 18 years in the early 1980s. Olson scored 38/40 on the Psychopathy Checklist.Christine Weller, 12, from Surrey, British Columbia, was abducted on November 17, 1980. Her body was found more than a month later on Christmas Day; she had been strangled with a belt and stabbed repeatedly. On April 16, 1981, Colleen Marian Daignault, 13, vanished. Five months later her body was found. On April 22, 1981, Daryn Todd Johnsrude, 16, was abducted and killed; his body was found less than two weeks later. On May 19, 1981, 16-year-old Sandra Wolfsteiner was murdered, and 13-year-old Ada Anita Court was murdered in June 1981. Wikipedia
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