 On December 6, 2013, a federal judge ruled that Duncan was mentally competent when he gave up the right to appeal his death sentence.Psychiatrists working with the prosecution diagnosed Duncan with pedophilia, sadistic personality disorder and antisocial personality disorder with narcissistic traits, but maintained that he was legally sane.A three-judge panel of the 9th Circuit U.S. Court of Appeals ruled on March 27, 2015, that a district judge correctly determined Duncan was mentally competent when he waived his right to appeal his death sentence.