File the claim, you pay your insurance company well. It is in their interest to be able to offset the expense. Tell them what you saw, give them the report which BTW it is police responsibilty to file!. Let insurance pursue. Fortunately, scratch is nominal and the side marker is cheap too.
Years ago, in my office driveway, a 2nd floor tenant's reception lightly backed into me as I was backing out. Never knew she was in car (on phone of course). Her reverse lights were not on. She hung up, dropped in reverse and admitted she never looked. Mortified she hit my LOTUS! The gentle 1/2 mph rub left some scratches (btw Persian Blue), popped same side marker. 95% buffed out.
SH!! happens, but the real issue is the punk with no morals.........walk in and see who cowers. They know damn well who they sent out that day!