RE: HOW TO KNOW IF YOU HIT A DEER
I've shot a few deer with the bow (and I've missed a few). Everytime I shoot, whether it's a fatal hit or not, the deer react and move. Even there are more than one deer together, the one's i'm not shooting at react. Guess it's what they call String Jumping. I have a feeling if you had hit this 6 pointer that he wouldn't have stood there and watched you try to reload, he would have been gone. But, in my experience, there are a lot of unpredictable things with whitetails.
That being said, when you go out in the morning, you need to find your arrow. That will give you the answer. If it's not where you think it should be, then it very well could have been in the deer.
GOOD LUCK