And all of those folks WERE First Responders - and probably saved a few dozen lives in addition to their own.
I wonder how many drew their guns before assessing the situation. One of the things emphasized in my target id class last months is not automatically drawing when you hear a gun shot. you can clear your garment and have your hand ready to draw but that may not be the best solution. Remember the guy in Nevada who engaged the one criminal before assessing the situation and the criminal’s backup killed him. All that being said ccw folks will be first responders either engaging the active killer or providing trauma first aid before EMTs are allowed on scene.