A report on the controversial murder case against California death row inmate Kevin Cooper, who was convicted of the 1983 murder of Doug and Penny Ryen, their daughter Jessica, and friend Christopher Hughes in Chino Hills, California.A report on the controversial murder case against California death row inmate Kevin Cooper, who was convicted of the 1983 murder of Doug and Penny Ryen, their daughter Jessica, and friend Christopher Hughes in Chino Hills, California.