As far as I can tell the duty to not kill some one only applies to the defense of property in North Dakota. The state is currently considering a "Stand Your Ground" law. It appears to me that the rules for SD are about the same as other areas, fire until the threat is stopped.
Still happily answering to the call-sign Peetza.
The problem, as you so eloquently put it, is choice.
He is no fool who gives what he can not keep to gain what he can not lose.
-Jim Eliott, paraphrasing Philip Henry.