Misunderstandings and small town politics divide Tennessee loyalties in City Confidential: Chattanooga -- Dangerous Trespassing. When Frank Casteel decided to buy some property on Signal Mountain in Chattanooga, he was worried about the locals. They liked to visit the popular Blue Hole and often left it trashed. He was ultimately able to strike a deal with the townsfolk that pleased both sides. Nevertheless, after three Chattanooga men turned up missing following a ride to the woods, Casteel was soon singled out as the suspect. It didn't help his case when his wife declared him the murderer. She later claimed she was trying to scare off Casteel's mistress. A&E investigates the hidden tapes and circumstantial evidence that rattled a Mountain town. ~ Sarah Ing, Rovi