I don't think he takes responsibility necessarily, but I think he did confess in a round about way. By saying that it "wasn't sexually motivated," but, something happened that he can "neither justify nor explain." Also, the guilt is "crushing him, he didn't know anything about her until too late." It bothers me when he says in the past he never read the news or allowed himself to think about it after he had done it because the pain and suffering of family and friends hurts him - WHAT ELSE has he done in the past??? But, this time he couldn't escape the news. Also, he is claiming that his death will serve as justice for her family.
This guy admitted that he had evil inside of him that he couldn't control - just like a drug addiction. What else did he do?!