Tuesday, April 29, 2003 By JAN H. KENNEDY and TIM BOTOS Repository staff writers CANTON — His father, in a fit of anger, stabbed him multiple times in the back of his head, neck and torso late Sunday, police said. The victim was only 21⁄2 years old. Nine hours later, Robert T. Luke left his dead son and drove to police headquarters and turned himself in. “He said he was very angry,” said Capt. James Myers, head of the detective bureau. “We’re trying to find out why.” Justin Daniel Luke was found on a bed in a second-floor apartment at...