I am getting a possible picture... now this is just possible, I am not pretending to be some infallible prophet or clairvoyant... a kid who knew he was in trouble and his dad was callous about helping. And this is how he got back at his dad. OK dad I will knife you up and then kill myself and now how do you think your attitude worked out?
Of course wrong to do... because there is a God that can help you recover from the worst tragedies. But maybe the lad and his dad never knew God.