1. He had safely left the building and was outside under no threat of harm. He went back in seeking solely to fight again.
2. He was confronted by the rink manager, a woman. She tried to stop him and was bruised as a result of him knocking her aside.
3. He approached the victim swiftly with obvious intent to fight. This may be the reason the victim struck out first.
4. According to the coroner, Junta beat the man so badly that his head was in danger of being detached from the spinal cord. The coroner was also able to account for fifteen blows to the victim's head. The victim had a 7 inch hematoma on the side of his head. His artery was severed. His vertabra had been damaged. His head was fractured in the back. His brain was so badly swolen that it would likely have caused death on it's own.
These are not the acts of a man simply defending himself. Once he reentered the building and pushed the rink manager aside, it was all over. Anything he did from then on out was not self-defense.
He had walked away. He was outside. At that point he was safe and in the right. Too bad for everyone he didn't stay out there.
In my opinion, this was his mistake. He should never have left, but should have resolved the dispute right then and there. By leaving so that he could simmer down, he instead had a chance to fume at the needless humiliation he had suffered at the hands of a worthless little punk. It ate at him quickly, and he could not let it rest. He lost his temper. I think he wanted to beat the punk up - - teach him a lesson real good - - but I don't believe he wanted to kill him. The punk ended up dead, and 6 to 10 is probably about right.
Bravo to our system of justice.