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Dennis Lynn Rader (born March 9, 1945), better known as the BTK killer, is an American serial killer who murdered at least ten people in Wichita and Park City, Kansas, between 1974 and 1991. Although he occasionally killed or attempted to kill men and children, Rader typically targeted women. His victims were often attacked in their homes, then bound, sometimes with objects from their homes, and either suffocated with a plastic bag or manually strangled with a ligature.