Well it is obvious that the squirrel was wearing a Miners Cap, and had braces (makes it hard to eat acorns)... and OSHA does not allow miner squirrels to work alone (due to safety issues) while digging up things... so it is also obvious that the damage on the other side is from his partner. Your wife must of missed seeing him.
From what I have seen, it appears that these squirrel duos are found in a lot of places, commonly centered around a pontiac service department.
Be thankful that we have not seen a class action lawsuit from the law office of Rodent, Winston, and Nutpicker. Just think of all the squirrel families that we as sol owners have impacted.
Sorry to hear about the damage to your car.
Has anyone that has experienced this gone to their insurance company? Perhaps they would love to get their lawyers involved to make sure that their customer is not going to get stuck with a bill when someone else is at fault?