Same thing happened to me in 1990 while in college. Me and my room mate thought we had exclusive rights to a honey hole that had 165acrs and joined a park right across the road.
Back then we would get up in our tree stand a good hour to 45 minutes before daylight.
Anyway 15 minutes after shooting light i see a flash light comming through the woods and i got a little upset when i heard someone cough 40yds from me.
About 1 hour later i heard a bow go off and the sound of a deer running toward me. The 6 pointer stopped 15yds from me and i could tell something was wrong because he was all hunched up.
Amyway i double lunged the deer and he ran 30yds and piled up. I flew out of my climber because this was my first buck with a bow.
While i was admiring my trophy a fellow walks up behind me and it scared the crap out of me. He says thanks for finishing off my deer, the deer had been gut shot.
I don't know what that deer would have done but looking back he probably would have laid down right where i shot him. I helped the man load the deer and he said since he had shot a deer and had messed up my hunting he would hunt another piece of property he had access to.
We killed some great deer in that patch of woods including a 10 pointer i shot the next morning from the same stand.
Joe Van