An active shooter is defined as an individual actively engaged in killing or attempting to kill people in a confined area using firearms. If an active shooter situation occurs, people should evacuate if possible, hide out of the shooter's view if evacuation is not an option, and take action against the shooter as an absolute last resort to save lives. When law enforcement arrives, remain calm and follow instructions by putting items down, raising hands, avoiding sudden movements, and not stopping to ask for help when evacuating. Provide critical information like the location, number of shooters, descriptions, weapons, and potential victims.