Same thing happened to me during rifle season 3 years ago. I was on a rifle lease and a guy had his son hunting in a stand on the other side of the property from me. He shoots at a buck and hits it in the foot, puts a crease right above the fronthoof. 20 mins or so later here comes a buck behind my stand across this huge feild. I too shot him in the neck because he was comming right at me and that was my best shot. He was only walking though, very slowly too.
Anyway, long story short, this was the biggest buck his son had ever seen, a nice 9 point about 125-135 inches-ishand his son was going in the military in a year so I let the son have the buck.
I think as did, they that the person who killed the buck is the rightfull owner. They left it up to me as to who would claim the buck and I choose the son and I don't regret it to this day.