A: Not for shooting a man, but for stealing a horse. "I PICKED a good one" note, he didn't get on his horse. "Horse wrustling" would get you hanged or killed quicker than killing another man. Back then stealing a horse was always death and killing another man might not even get you charged if you were just.
I know you have been waiting 3 years and a month for a response so here goes...
That is ridiculous saying that he was actually shot for stealing a horse. He ran and stole the horse because he shot a man in cold blood due to his drunken feelings of jealousy over wicked Felina the girl that he loved.