Three adults pleaded not guilty yesterday to charges they tortured a captive teen for a year with belts, a baseball bat, knife and acid, reports the San Francisco Chronicle. A neighbor has yet to enter a plea. The 16-year-old boy was shackled to a fireplace in the California home of a couple who took in him and his aunt. He managed to flee late last year and seek help. The couple has said they simply followed the aunt's lead in beating the boy.