On the morning of June 5, 1983, Bill Hughes arrived at a Chino Hills, California home of Douglas and Peggy Ryen, to pick up his son, 11-year-old Christopher from a sleepover with his friend, Josh. When Bill entered the home, he discovered Douglas and Peggy Ryen, the Ryen’s 10-year-old daughter, and his own son, all dead. Eight-year-old Josh Ryen’s throat had been slit, but he would survive the brutal attack. And it would take Sherriff Floyd Tidwell of San Bernandino only four days to identify Kevin Cooper as the killer. And he did so with such certainty that there was no going back. This is the story of Kevin Cooper. Is he guilty beyond all reasonable doubt? You decide.