Carl and Sarah Collier feared their cold and wild granddaughter, Holly. But when they forbade Holly from spending time with her 16-year-old female lover, Sandy, they set in motion a horrifying plot... Holly and Sandy asked around for a gun. They made a to-do list, and they told their friends what their plans were. Then, on a summer night in Georgia, they unleashed an ambush. The scene they left behind would stun hardened investigators... Carl and...