After midnight on July 6th, 2012, three teenage girls walked into the thick Appalachian woods somewhere along the Mason-Dixon line. Hours later, under the glow of a nearly full moon, only two walked out. The very last time Dave and Mary Neese saw their only child Skylar was in a grainy black-and-white video. In it, she's sneaking out of her ground-floor bedroom in the middle of the night, her purse over her shoulder, her brown hair swinging as she hurries across the small parking lot to a waiting car. What happened to Skylar Neese has become gothic American lore: the odd girl out in a...