Shooter in the building! Now what? This informative course is a must for school personnel, church staff, managers and CHL/LTC holders. How safe is your school, church, or workplace? ALERRT (Advanced Law Enforcement Rapid Response Training) law enforcement instructor will be supporting. The critical gap in time between when the shooter first pulls the trigger and when law enforcement arrives is where we focus the majority of our training. The action taken by citizens under attack during these critical first minutes can mitigate the number of lives lost. People in the crisis zone have only minutes or even just seconds to decide what they have to do to survive until law enforcement can arrive.