I will only add...could you have contacted your DNR/DEP and asked for a vehicle collision tag? Now I understand the vehicle did not kill the animal, but after skinning were the injuries severe enough that the animal would have died? If so, let the police or game department tag the carcass...

I'm stating this so he can save a tag, but rather for reporting purposes.

Here in CT, we currently are almost infested with deer in the entire state, with extra tags given during all seasons on the coastline. The insurance companies, DEP, and local police want all deer involved with a car collision to be listed as such. It is a statistical thing, but very important in areas with high deer numbers and frequent collisions.