By this I mean – when does self defense become a potential criminal charge? Say when you have get into a street fight and the other person attacks first. Do you have the right to seriously injure/kill them?
If someone robs your home and they are armed, but ran away, are you allowed to shoot them?
Is there a place where the law draws a line between the two?
Also, what if in a case of self defense, a martial artist has a chance to choose any move (i.e. The aggressor is looking somewhere else) and then chooses a lethal move even though given the opportunity to incapacitate the opponent?