Janet Rosen

The outcomes are indeed very sad.
However I don't think what happened was a fight. I think what happened was one person was attacking another. When the person being attacked felt he could no longer run away, he took appropriate steps to defend himself.
It has to be understood that nobody can control the universe or all variables therein. Doing the right thing, or perhaps to put it better, "a right thing" doesn't guarantee a good outcome. It doesn't guarantee peace of mind. It only guarantees that you have acted in accordance with your principles and ethics.
Me, I might have done a different thing from the punch to the face, but I definitely would have taken SOME kind of action like that. And yes, live with the consequences because I'd rather that than have been the one dead on the ground.