Ah, but how can they be sure it was roadkill? Did they see tire tracks down the back? In some countries, tail, foot and leg are delicacies!
It may be different for Kentucky but many states do not permit hunted meat to be sold or served in restaurants.
It would have to be farmed venison, and there would also be slaughtering and cleaning requirements by the state - you can’t just go to the deer farm, pick one out and haul it to the restaurant, skin and brains and gut contents and all.