“another choir boy?”
He’s probably singing a different tune now, wherever he is.
He certainly has one ugly arrest on his record.
The one that should be catching all the grief in this incident is the girlfriend. She started the whole episode by parking in the handicapped spot. She apparently escalated the incident verbally before getting out of the car to get in the shooter's face. She could have calmed this whole situation down.
Put yourself in the victim's position for a second. You're in the store and you come out to see your angry girlfriend in an loud argument with angry man an arm's-length away from her. The best response would be grab your girlfriend and move her away, the next to get between them, and the least desirable response to push the guy away to make space between the two. He could have chosen better but I think most men's first response would be to protect their girlfriend. No matter how wrong my girlfriend might be, I'm not going to let some guy get physical with her. The whole time he's probably thinking "what's this b*tch got me into now?"
Like almost all incidents of this sort, there is a whole cascade of bad decisions leading to the regrettable outcome. The real cause of this situation appears to be the one who is getting none of the blame - the girlfriend. She has as much blood on her hands as the shooter or the victim.