The Evolution of Active Shooter Response Training Protocols Since Columbine: Lessons From the Advanced Law Enforcement Rapid Response Training Center

On April 20, 1999, two active shooters attacked Columbine High School. This attack became a catalyst that changed the manner in which law enforcement prepared for similar attacks at schools and other locations. Departments across the United States developed and adopted active shooter response training protocols. To assist law enforcement with this work, training centers were created including the Advanced Law Enforcement Rapid Response Training (ALERRT) Center. ALERRT was formed in 2002 and was named the national standard in active shooter training by the Federal Bureau of Investigation (FBI) in 2013. To date, ALERRT has trained more than 130,000 first responders from over 9,000 agencies in active shooter response. This commentary leverages our extensive expertise as directors of ALERRT. Specifically, we discuss how training protocols have evolved over the last two decades to include active shooter response teams, solo officer response, medical intervention training, integrated response training, and civilian response