
On June 4, 1983, Doug and Peggy Ryen and their daughter Jessica were brutally murdered in their Chino Hills, Calif. An 11-year-old neighbor spending the night, Christopher Hughes, also lost his life.
On June 4, 1983, Peggy Ryen, her husband Doug, and their 10-year-old daughter Jessica were stabbed and slashed to death inside their home. Many wondered back then if the right man had been convicted for the crime, and even more wonder today if the real killers got away. It was a massacre, brutal and bloody, and more than three decades ago, it shattered the upscale horse community known as Chino Hills in Southern California. Now, with new witnesses, lost evidence and a DNA test that doesn't link him to the crime, the question remains: will Cooper ever walk free again? MASSACRE IN CHINO HILLS The only thing that keeps me going is I know I'm innocent," Cooper told Moriarty. His case has drawn international attention from the likes of Pope Francis and Kim Kardashian West.Ĭooper has maintained for more than three decades he did not kill Doug and Peggy Ryen their daughter, Jessica, 10 and a family friend, Christopher Hughes, 11. In May 2019, for the first time, Moriarty visited Cooper at San Quentin. Cooper claimed he'd been framed for the murder of four people in a horrific home invasion in Chino Hills, California, in 1983.

Our investigation began with letters sent by Cooper from San Quentin State Prison outside San Francisco. For two decades, "48 Hours" has investigated the case of Kevin Cooper, the California death row inmate who has always claimed innocence.
