Quote:If someone breaks into my house and has a weapon with intent to kill me, I will kill that bastard.
Not exactly the same situation, though. In your case you are facing an armed intruder - and frankly in that case my bet would be on him winning not you - but let's say you get lucky and manage to kill him. It is a survival situation and in most states you wouldn't even be charged for defending yourself.
However, strapping an incarcerated prisoner to a gurney and sticking a needle in his arm hardly rises to the level of danger.
It is mere vindictiveness.