I would file a police report and report it to my
insurance company but not file a claim. Then do as Calif. Ted suggests. I would tell him in writing he was at fault. If the guy sues or makes a claim in small claims court I would not even bother to get an attorney and probably at that point negotiate a settlement less than $1500. If it is in small claims court and you have the time you can easily argue the case yourself.
If you end up paying the other guy something, sometimes when you lose the battle, you end up winning the war!