He defended himself by biting off someone's ear??? Why does that not sound in the least bit plausible? If someone was biting off my ear and I had a knife I can tell you, I'd use it!!! Then I'd end up in the dock, its a no win situation!
"Almost anything you do will seem insignificant, but it is very important that you do it. You must be the change that you wish to see in the world." Gandhi