You are very fortunate that your car was not impounded.
What's done is done. What matters is now. Your instincts are solid about not bailing him out of his jam of his own making. Give him the gift of dignity to realize the consequences of his choices.
His addiction is not about you although it can effect you as much as you allow it to do so. Please consider picking up a copy of Codependent No More, by Melody Beattie. It's at your library or used for about $2.00 at Amzon. It can change your life , if you allow it to do so.