The police officer told me there was no way to get anyone even if I knew which car did it (the second time was in the gated apartment compound we lived). We took his advice and paid the deductable to fix the car. We had coverage for "uninsured motorist" besides full coverage. My insurance agent told me there wouldn't be any increase of insurance and it seemed that was the case.
We reported the accident one week later, and the police officer had no problem with it. You might have to go back to where it happened to show the police officer.