The creepiest of the creeps

So this kid I went to elementary school is apparently in jail for life without possibility of parole. Now, this normally wouldn't be such a huge deal, except that this kid was sort of my nemesis, I always found him a little creepy and weird, but my mom used to say he was the way he was because he had a crush on me. I don't believe that (that's what mom's always say in that situation), but I was also like, 8. Anyhoo, flash forward to 2004. He's sort of had problems his whole adult life with drugs and such. So he's dating this really successful criminal defense attorney in California, and they're both using cocaine a lot. Well, he heats up two spoons of cocaine, and injects it into her and watches her die in her hot tub. He then proceeds to get to the roof of her high rise apartment building, gets obliterated on cocaine and heroin, strips naked and threatens to jump. He states that he killed her because he was jealous of her, and he wanted her to die. So fucked up! So, clearly, he was convicted of murder, and is serving life without parole. I don't know how to really think about this - its just so surreal. I mean, it happened a while ago, and I didn't know him now, obviously, but its weird to think that someone you knew as a kid could do something like this...