It is important for anyone who is licensed to carry a concealed handgun to know the law pertaining to self-defense and the use of force. Here is excellent insight into the unique legal considerations pertaining to defending someone asserting the affirmative defense of defense of self/others.
https://armedcitizensnetwork.org/the-shifting-burden-of-proof?idU=1
Once again, these types of cases deal with a wide variety of legal concepts and issues, and it is always important to consult with an attorney experienced in this area of the law.