answer:Why was he out driving your car around (it’s not like he was doing a repair and wanted to be sure that it was running properly)? I don’t know what he could have done to lead the cops to search the vehicle, but I’m sure there must have been something. As far as them finding the weed, for all they know, it could have been his. They found it while he was in possession of the vehicle and possession is 9/10s of the law (so I’ve heard). It doesn’t really matter whose car he was in (wether you were a customer or a friend letting him borrow your car). If one of your friends left weed in your car and you were caught with it, you would be responsible for it. The only way I could see you getting him out of it would be confessing that the weed was yours and not his. I don’t know if they could charge you since they didn’t catch you with it on you, but they might be able to since you would be confessing that it was yours. I’m not sure what getting arrested for the weed has to do with him being able to paint your car, unless he just can’t afford to buy the paint before hand now (if you were going to be paying afterwards). I would feel bad about him being arrested because of my stuff. Do you trust him enough to believe he is telling the truth? Do you think he could be making it up (like he found your stash, took it, and is now making an excuse)? I would talk to a lawyer before making any decisions if you are planning to try to help him get out of it.