This video is great.
First, as a sort of entrée, you get to see a genuinely, chillingly insane person confessing to murdering someone for no reason with the same emotion in their voice as if they're describing a trip to the supermarket.
Then you get to see a school shooter pathetically pretend to be insane/suicidal and blame his actions on a "demon" and a detective trolling him about it for about 20 minutes straight.
No wonder it's got 51 million views.
Made me think it's a shame school shooters kill themselves so often cos it preserves some sort of glamour about them.
This is a very popular YouTube rabbit hole, certainly in my head.