Active shooter at a supermarket in Boulder, Colorado today. Video

(simulated violence)POV video from T.C.C.C Active shooter training.

Police Engage An Active Shooter

Police Engage An Active Shooter

Chaotic scenes at Michigan State University as heavily-armed

Milwaukee Police Respond to Reports of an Active Shooter at Halfway

Milwaukee Police Respond to Reports of an Active Shooter at Halfway

Active shooter situation at a condo. Luckily nobody died besides

Active shooter reported at a slaughterhouse! Several fatalities

CCTV of the active shooter in Jamaica, Queens that killed 1 and

Nashville active shooter. Manifesto pages leaked.

Nashville active shooter. 3 pages of manifesto leaked.