Borsch 's statistical analysis recommends a tactic : aggressive action . For law enforcement , the tactical imperative is to respond and engage the killer without delaythe affected orthodoxy of cumbersome team formations fails to answer the rapid temporal dynamics of active shooter events and fails to grasp the nature of the threat involved . For civilians , when necessity or obligation calls , the tactical mandate is to attack the attacker — a strategy that has proved successful across a range of incidents from Norina Bentzel ( William Michael Stankewicz ) in Pennsylvania and Bill Badger in Arizona ( 2011 Tucson shooting ) to David Benke in Colorado
2011 Tucson shooting
2011 Tucson shooting
Active shooter