A terrified voice cried out in the night. "Who are you? What do you want?" The sound of snapping twigs closed in on the five teenagers enjoying an evening around a glowing campfire at Gitchie Manitou State Park. The night of music and laughter had taken a dark turn. Evil loomed just beyond the tree line, and before the night was over, one of the Midwest's most horrific mass murders had left its bloodstains spewed across the campsite. One managed to...