Let us not forget that we all make mistakes in moments of real rage. Now, we can all say that we are better than that, but the truth of it is that we can lose control. In my younger more impetuous years I blacked out one time and beat a bully senseless, and could have easily killed him if others hadn't been around to pull me off him. We went on to get along fairly well after that, but all it would have taken in that fight was one wrong thing and he could have been dead. Life is fragile, and we are adept at taking it without meaning to. So before we go destroying this man's artificial legs and damning him to a dark pit of filth for the rest of his natural life lets just step back. Us being vindictive won't undo what he did. It won't accomplish anything productive at all. Locking away a problem isn't solving the problem. They need to get to the truth and find out what actually happened.
If it was domestic violence then I can't say I am ready to fry the man. Couples fight, and depending on the personality of the two, the fights can be huge. Some people are weaker, and in that moment of rage just lash out. He isn't evil. He is a human being who lost copntrol of his emotions and actions and did something I am sure he regrets. I would rather him face his crime, feel guilt, and give him an opportunity to feel penance.
If it was premeditated then he will be brought to justice, and maybe it is fair that he loses his artificial legs for a while, maybe forever, as a penance for his actions.
If it was a genuine accident then good luck to him, because the legal system he is up against already seems to have a verdict.
Either way, whatever the truth is, a life is lost, and another is ruined all because of human emotions. Damn shame.