What Did Ed Kemper Do

The Case of Ed Kemper

Edmund Emil Kemper III was born on December 18, 1948, in Burbank, California. He became one of the most studied serial killers in American criminal psychology. At six feet eleven inches tall and weighing around 425 pounds at his peak, he was physically imposing, which factored into how he approached his victims and how law enforcement tracked him. His earliest killings targeted his grandparents. In 1964, at age 15, he shot and bludgeoned his grandparents, Edmund Sr. and Lucille Kemper, in their San Jose home. He then drove to his grandmother's workplace and shot her there as well. This first murder spree established a pattern that would continue: he typically targeted women who appeared vulnerable and acted alone. He also killed his mother, Kathleen, and her friend Nancy Johnson in 1972. These later murders occurred in their Apartment 216 in Santa Clara. He dismembered their bodies and stored parts of them in a cooler in the basement laundry room.

What Did Ed Kemper Do

Between 1972 and 1973, Kemper murdered seven additional women across California, mostly along Highway 101 and in the Santa Cruz area. His victims included college students and young women he picked up while hitchhiking or who were traveling by car. He typically shot them at close range, then engaged in necrophilic acts and dismemberment before discarding the bodies in remote locations or leaving them in his parents' garage. The bodies were found between April and August 1973. By the time he was arrested on August 16, 1973, at a bus station in Charlotte Amalie, St. Thomas, U.S. Virgin Islands, the sheer number of murders had made him one of the most prolific serial killers in California history up to that point. Kemper was tried in Santa Clara County Superior Court. He initially pleaded not guilty by reason of insanity but eventually changed his plea to guilty. In 1974, he was sentenced to two concurrent terms of life imprisonment. California Supreme Court later modified his sentence to 78 years to life, though his exact sentencing details shifted as state law evolved. He has been denied parole multiple times, most recently in 2023. He remains incarcerated at Corcoran State Prison in California. What makes his case notable beyond the body count is how extensively he collaborated with psychologists. Dr. Herbert Rosenwein conducted lengthy interviews with him, and Kemper voluntarily participated in psychological study for decades. He wrote an autobiography, Inside Ed Kemper, published in 2010. From a forensic standpoint, his case contributed to early understandings of how intelligence and methodical planning can coexist with severe psychopathy. He was not a random spree killer. He planned routes, identified vulnerable populations, and maintained a level of operational discipline that surprised investigators.

If you are researching this for academic or professional reasons, the primary source material includes court transcripts from Santa Clara County, the Rosenwein interview records housed at Stanford University, and the California Board of Parole hearings transcripts, which are publicly accessible. The parole denial records are the most recent documents and contain updated psychological evaluations, though they do not indicate any change in risk assessment.