Edmund Kemper — The Co-Ed Killer

Edmund Emil Kemper III, known as the "Co-Ed Killer," murdered ten people in California between 1964 and 1973, including his grandparents, six female hitchhikers, and his own mother and her friend. Standing 6 feet 9 inches tall with an exceptionally high IQ, Kemper presented a contradictory profile — physically imposing yet articulate and sociable, regularly drinking coffee with Santa Cruz police officers at a local bar, none of whom suspected him. Kemper began killing at age 15 by shooting both his grandparents, later saying he wanted to know what it felt like. He was committed to Atascadero State Hospital and released at 21 against his psychiatrists' recommendations. He then began picking up female hitchhikers near UC Santa Cruz, killing them, and engaging in necrophilia and cannibalism. In April 1973 he bludgeoned his mother with a hammer while she slept and then killed her best friend. Rather than flee after killing his mother, Kemper drove across the country and called the Santa Cruz police from a payphone to confess. Initially disbelieved, he called back repeatedly until officers came to arrest him. He was convicted of eight counts of first-degree murder in 1973 and sentenced to life in prison, a sentence he continues to serve. Kemper's extensive and unusually self-reflective interviews with FBI agents Robert Ressler and John Douglas in the 1970s played a foundational role in developing criminal profiling techniques. His willingness to analyze his own psychology in clinical detail provided insights that shaped the FBI's Behavioral Science Unit and are still cited in criminology training today. He served as one of the primary inspirations for the character Bill Tench in the Netflix series Mindhunter.