User:Geo Swan/David J. Sierotowicz

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David J. Sierotowicz
Nationality USA
Occupation Police officer, Professor
Known for Specializes in "active shooter" scenarios

David J. Sierotowicz is an American educator and Police officer. He has specialized in determining how Police officers, and how the general public, should be trained to prepare for and react to what Americans call an "Active shooter" scenario - one or more rogue individuals, shooting innocent people.