Interesting discussion regarding the use of force against an attacker at www.useofforce.us: Always remember: The threat must be current, immediate, and unavoidable. Your level of force must be appropriate to the threat. Your use of force must stop when the threat ceases. If at any point you smudge the first, exceed the second, or forget the third, you are running the risk of a criminal indictment—and if the results are glaring (e.g., you killed him), it’s nearly certain. Only a victory on all four constitutes a true win: You must be able to perform You must defeat your opponent You must be cleared of all criminal charges You must be cleared of all civil charges Go to the website to read more.