A Phoenix man is behind bars after police charged him with killing his 13-year-old son with an ax. As ABC 15 reports, police went to the home of 51-year-old Gary Sherrill yesterday afternoon after his ex-wife reported that he'd failed to return their son. Sherrill initially told cops that David Sherrill wasn't there, but eventually let them in, where they found the boy dead with stab wounds and lacerations. Sherrill confessed to killing his son with an ax, and told police that he was afraid of the boy and thought David was a demon who was going to eat him. (More Phoenix stories.)