It was 1980, and Bryon Schletewitz was planning to take over his family's general store in Fresno so his parents could retire. Josephine Rocha was looking forward to being a high school senior and had taken a part-time job at the market to pay for her new car. Douglas White worked at the shop while going to college and hoped to start a real estate business with his mother someday. But on a warm evening that year, the three were shot to death as part of a revenge plot cooked up in a Folsom Prison cafeteria. The scheme's architect, Clarence...