Jon, call the cops. Get an officer to look at the pics, and the damage on his car and yours. Once the cop sees that it was his car that hit yours, tell the cop that you want the man's insurance and information. He will HAVE to give it at the cops request even though this might have been a few days ago. Once you get that, file a claim. Go to the police dept. to get the report btw, more than likely the cop won't come to just hand it to you.

This is through experience. Good luck bro.