I wouldn't shoot to kill.
I wouldn't shoot to wound.
If the level of force required to dissolve the situation was to shoot and was within the law, then that is what I would do. Neither to wound or be fatal would be my goal. Being wounded or killed is the fault of the assailant. My only fault and my only goal would be first to protect myself, my property, those I care about or someone who cannot defend themselves. Secondly, excercising my rights, and thankfully that is not illegal, would be the only other thing I would be doing.
Shooting someone, of course, is not a walk in the park and must be taken seriously. I have spent hours and days reading through the laws and contemplating my response. Preparedness never can always 100% dictate your reaction when what you have prepared for comes to pass, and you hope it never does come to pass, but it definitely gives you a bit more ability to handle the situation if it does happen.
Shooting a child running out of a store carrying candy is outside of the law. The child poses no threat to anyone. You are not legally able to shoot a person in such a situation. You can not shoot a shoplifter, no matter what age. Shoplifting is a non-violent act. Now, shoplifting while pointing a gun at you or brandishing a weapon in a threatening manner is armed robbery, and IS a violent act. Or, if they broke in after hours to steal something and you happened to be there, you are within the law if you choose to use a level of force up to lethal force to protect yourself and your company's property. Law surrounding the use of lethal force outlines your ability to defend yourself, your property or someone else who is in danger. Lethal force is available if you are being physically harmed or hold a reasonable belief that you will be physically harmed. There is no outline telling you at what level of physical harm you are allowed to shoot someone, because there is no such thing. Physical harm or reasonable belief that you will be subject to physical harm at any level is a level which legally allows you to use appropriate force, up to and including lethal force, to dissolve the situation.
Pretty much, falling victim to a violent act, beit armed robbery, assault, rape, mugging, breaking and entering, etc...grants you the right to defend yourself with "the appropriate amount of force up to and including lethal force" to stop the assailant from proceeding to cause anymore harm to you, your property, your family or a someone else, their property or their family.
And I will tell you again. If someone commits a violent act either against me or in my presence, as of right now, I have no problem using force, up to and including lethal force, to stop them. I feel obligated to do so. I suppose I will have to deal with the post trauma. But, to me...I would rather suffer through that than put someone else in danger by doing nothing.