Agree. The whole situation is bad. I also think you're making a big assumption about going to prison. We haven't seen the details of the video. This person may have legitimately thought he was in danger and was protecting himself. Knowing this punks history and his blatant disregard for rules and law enforcement, I'd have a very hard time convicting the shooter.
But in this day and age, I know I would NEVER pull up on someone I did not know and prey upon them like this punk does.
He is damn fortunate his luck didn't run out, yet he promises to keep this crap up. He will run out of luck eventually.
Some people don't learn from their mistakes.