Paul John Knowles (April 17, 1946–November 18, 1974) was an American spree killer (also known as the casanova killer) tied to the deaths of 18 people in 1974, though he claimed to have taken 35 lives.
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Robert Berdella (January 31, 1949 – October 8, 1992) was an American serial killer in Kansas City, Missouri who raped, tortured and killed at least six men between 1984 and 1987.
