> bullshit i am not allowed to shoot someone with a knife until they are way too close. of course you are. the tueller drill works the same way for a cop or a citizen. within 21 feet open fire. what matters is your reasonable belief in that moment. that includes that things you've learned. if you've ever taken a self defense course on when it's legal to shoot, i.e. you were taught the tueller drill, then it would be reasonable to shoot as soon as they come within 21 feet.  you should keep records of the classes you've taken, the books you've read. put notes in the margins, put the date you read it. write about what you learned in a journal and include the date. all of that could be used by your attorney to show that you knew you were in an imminent risk of great bodily harm or death as soon as the person (with an unobstructed path to you) came within 21 feet.
United States