RE: Another ethics / legal question
Still might be tough to prove that you're the one who shot it. From the sounds of the hypothetical, there isn't a way to distinguish this deer as the one you shot the day(s) before.
But if I knew for a fact that it was my deer, then yes, I would tag the doe then go buy another tag. Then read up on how to track an animal properly as obviously I did a piss-poor job the first go around.