Cpl. Mark Garcia, police officer, Provost Marshal’s Office, clears rooms during the active-shooter scenario at the Education Center Feb. 25, 2014. The officers helped simulate casualties and provide triage when necessary. - Cpl. Mark Garcia, police officer, Provost Marshal’s Office, clears rooms during the active-shooter scenario at the Education Center Feb. 25, 2014. The officers helped simulate casualties and provide triage when necessary.