My suggestion is to get a cell phone pic, if you carry a phone. That may help drive the point home to the asshat that he is not as anonymous as he thinks he is. It may also bolster your side if it comes down to your word against his. On that point, my question if I'm law enforcement would be, Why would a cyclist bring this up if nothing happened? I suppose the driver could come up with any number of excuses, including the old standby, I didn't see him. But if you're lucky enough to get the police to notify the guy, and he has to go to the trouble to explain himself and worry about consequences, he's not getting out of the situation what he intended. People who do this on purpose are clearly cowards who don't believe they'll suffer any pain for it, including justifying their actions. So an ordeal with a leo may just make a believer out of him... Hey, I can dream, can't I?