Why do people continue to take the law into their own hands rather than let the police do their jobs? I'm sure this guy will get off Scott-free of course, but at least he was arrested for assault. I'm not defending his victim's wrongdoing in saying this, but allegations are just that-- allegations. That is a job for the Criminal Justice system, not every armchair vigilante out there, to determine guilt or innocence. Even though dealing with this guy in prison will cost taxpayers a fortune in medical costs, I'm all for locking another vigilante up in the name of public safety.
I find it hard to believe he didn't mean to assault the guy. He could have called the police and had them arrest the man at his home. Sorry but something smells funnier than the typical old man scent of ben-gay and moth balls. This sounds a lot like intentional assault to me.