Would have passed on him, mother nature takes care of her own and is often cruel. Now you burnt a tag on a buck you can't or won't eat. I think the ethics things gets blown way out of proportion sometimes. Yes, we owe it to the animals we harvest to be competent shots and provide quick clean kills, so in this instance the first hunter who wounded this deer acted unethically, be it by accident or just lack of practice. Also, I have seen some pretty banged up deer, especially bucks live several years after injury; even seen a three legged deer once (had 4 legs, one was just limp and useless from an old injury). I will say this though, if in your mind you feel you did the ethical or right thing, that's all that really matters.
How come everybody I meet is a deer hunting expert?