I do lots of concealed carry training and I ask my students the same question every time: When can you use deadly force?
I get all sorts of answers. Typically someone will say, “When your life is in danger.”
That is true, but not the whole story. Take a few minutes and watch the video. I think you will get the idea. It is more complex than you think.
The rules governing deadly force are vaguely specific or specifically vague. They are in place to protect people, but also to give prosecutors lots of leeway to find a reason to charge you with a crime. Learn these rules.