did the other shot look fatal? When you opened him up did it look fatal? It would have been easy to tell the difference between damage done by his and by yours... If you didn't know the deer was hit until the kid said something I would suspect that it wasn't. Personally I would have kept the deer if I was sure that I was the one that killed it. It's like giving a kid a reward for not putting a good shot on a deer... Just my .02.