Looks like Madison had anger and control issues. I based it on the fact that he stopped what he was doing and chased down the guy that ended up shooting him.
That was my thinking as well. Looking at his picture, he looks like someone who thinks he's tough and can push people around.
Still, I think the kid should have showed him the handgun as he walked up and that might have saved everyone some grief.
I'd convict on manslaughter, but not first degree.