I know of a few people that have taken in fawns from car-killed does and nursed them til they grew. They kept the deer in the house as a pet at times and during deer season they put a orange vest or a orange bandanna around it's neck. In a few years it grew into a nice 8 point buck and they couldn't keep it in the house because it got rammy and mean. A neighbor shot it across the road in a field chasing some does with the orange vest on it knowing that it was their pet (which I think is illegal, The pet part) And there ended up being a huge feud over it. These people have nursed many wild animals back to health. This is what could have happened in your case.