User:Geo Swan/David J. Sierotowicz
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Revision as of 17:42, 3 May 2021 by The Great Vandalizer (Talk | contribs) (The Great Vandalizer moved page User:Geo Swan/David J. Sierotowicz to User:Geo Shit/David J. Sierotowicz)
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.