Thats the most important question. One thing to carry it, another thing to be allowed to use it. However, he is a white man, higher probability he could get away with a "stand your ground" or "self defense" type argument. I would advise brown/black people to avoid.

The odds of being in a state that “allows it” is like 86%. There’s only about 7 states that give a person guff about exercising their constitutional rights in America. 86% isn’t “luck”