There were two, let's say, "major" bullies at my school. One of them was aggressive, strong and stupid to the core. He was the one to be really afraid of because he had that something in his eyes. Something terrible. To make a long story short, he ended up in jail for murder.
The other one was quite smart and used his gang to do the dirty job as he was physically weak. Back to school days, I listened to heavy metal and had a long hair (Actually, I still have the similar haircut like on my profile picture). The length of my hair was the reason to call me names and so on. To be honest, he never intended to harm me physically because we lived nearby and we were like...neighbors. Anyway, once I got tired of it and confronted him while he was alone and bit him up. Not too bad, no broken bones or something, because I wasn't a kind of a fighter guy, but he was on the floor. That fight taught him a lesson and, surprisingly, he never tried to have his revenge. And, to be true again, I was always frightened he would.
Eventually, he's been imprisoned for stealing. He spent two years in jail. Some years ago, I visited my parent's house and accidentally met him in the street. We recognized each other straight away. We had a small talk and he said that he still lives with his parents in the same house and works as an auto mechanic. We didn't talk about his term in jail nor our fight, we just exchanged some standard phrases, then shook hands and walked away.
I thought to myself: “What a chance meeting! After all these years, wow!”
I can't prove it, but I think he's a regular citizen right now. Because, again, he had that something in his eyes, that something of a man who has learned from his mistakes. At least, I hope he has.