Here in the state of Iowa, I am a concealed carry holder that has taken a safety class as required by law to obtain a permit. We went over some of the basics in class but I would like to take a more tactical/self defense oriented class later on. I understand the basic principle that if someone is pointing a gun or knife at you, putting you in a hundred percent clear life or death situation you are in the right should you choose to use deadly force to save your own life. But I don't entirely understand the appropriate circumstances to declare you have a weapon, draw your weapon, and anything UP to the point where your shooting for your life. for example if a shady character is following you at night with their hands in their pockets but you haven't seen a knife or gun yet, can you mention you have a weapon while attempting to escape? My basic understanding is the gun should never come out of the holster unless your life is already in danger.