would never stand for that shit - myself included. I had a similar incident years ago and decided I needed to take matters into my own hands. A bunch of guys could roll in there with baseball bats - WTF is any staff gonna do?
Take what dipshit owes you off someone else's car, if that what it takes. I mean Fuck Me.
Sounds like you gotta act now. If this guy's been in court, all he has to do is a midnite run and you're all fucked.