What's great is the older you get, the more crazy stories you hear about former classmates. Usually if you think back, they were usually a bit "off" or troublemakers even at a young age. 3 of the most memorable from my past....
One guy hung himself in his jail cell after getting pinched for dealing blow and then snitching on the wrong people.
One of my best friend's little sister is currently doing 10+ because she got so strung out on meth and was desperate for money, she slammed a skillet over some old lady's head because she wouldn't give her any cash.
Finally, the guy that got so fucked up on whatever was in his mom's medicine cabinet, he in turn grabbed her handgun and ended up killing a preacher in his neighborhood. Not to rob him, not because he had a problem with him...but because he was the first person he encountered and the guy just said "hello" while passing by during a leisurely stroll on a Saturday evening. Once he passed he went back to the preacher, ordered him on the ground face down at gunpoint spread eagle, and just popped a cap in him execution style.