One of my friends had a kid with this guy who was really shitty and addicted to heroin. He use to get her kittens and then told her she wasn't good at taking care of animals because they would "run away." We found out later the police were investigating him for animal abuse. He apparently would kill the kittens to make her feel bad.

He died of an overdose. She later remarried a really wonderful person and her kid is growing up great. Her ex was a shitty human being and a terrible person and everyone in the world is probably better off without him in it ... but I still don't celebrate that he's dead. I just find the whole thing sad.