[aznatama]

There may not be a police report filed, that's why there's no record at the police station. Collection agency may have just BS'd a number to get you to pay. Shady at best.

You have insurance, they should take care of this for you. If you don't want to involve your insurance carrier, then it'll be a headache for you, but not impossible. After all, State Farm is probably just going off of a report by their claimant, who may have mis-read the plate or even completely falsified the information.

Just ask what date and time this occurred, then provide proof that you were in SoCal. (could be a purchase receipt, social media tag, school class attendance, anything that puts you in SoCal). Also, their description of the car that allegedly did the hit and run would help, as it likely doesn't match yours.

Also, all the "lawyer up" comments are, IMO, silly. Do you really want to pay an attorney to handle this for you? probably not. Do you even have a legit claim? Probably not (yet).