Child pornography was found on the home computer of the hulking loner accused of kidnapping two St. Louis boys, law-enforcement sources said Sunday. As a result, the feds are considering slapping Michael Devlin, 41, with child-porn charges, the sources said. Devlin, a 300-pound pizza-parlor manager, was arrested Friday in the kidnapping of Shawn Hornbeck, 15, who was kept for four years, and William Ownby, 13, who was rescued after four days.