CORSICANA, Texas -- Workers at a Wal-Mart in Corsicana, Texas, discovered that a 14-year-old boy had been living inside the store.The teen avoided detection for four days by hiding out in two secret compounds he'd built. One of them was behind boxes of strollers, and the other was behind stacks of paper towels and toilet paper.Officials say the boy survived by eating food off the shelves. He was so concerned about being caught that he wore diapers instead of using the store restroom.He even had a pet: a fish he took from the pet department.A trash trail led to the teen's discovery at the 24-hour store. Police responded to the scene and released the boy to the custody of relatives.The boy was apparently visiting relatives when he ran away. There are no indications that Wal-Mart plans to press charges.