The deer should still be tagged and added to your season total, but I can also see where you are coming from. I have little tolerance for idiots in the field. Any moron knows to at least give some effort to see if there was a hit. I took a so called friend hunting with me a few times. I told him not to shoot a young buck. He shot a young spike thinking it was a doe. I forgave him for that. He did it again a week later saying he thought it was once again a doe. He was 50 yards from the spike, which had 8 inch spikes. Anyone could tell a spike like this from a doe at 50 yards with a high powered scope. The red flag went up this time. A week later he shot at what he said was a nice buck. He said he had missed. I asked did you look for blood. He said no. I made him look for any signs of a hit. I found the blood trail and made him follow it. It lead to you guessed it, another spike. I told him at that spot I hope you enjoyed hunting my land with me, because you will never step foot on it again. If I hadn't had been there he would have not even looked for the deer and it would have been wasted. I was too patient with him because he was a friend. I still occasionally speak with him but he will never hunt on my property again. Always look for signs of a hit. There is no excuse not to. Being a total dumbass is not an excuse. I don't think he should give up hunting, but I sure hope he learned a lesson from this. Don't let it happen again.