Federal Bureau of Investigation. (n.d.). Active Shooter Incidents. (Accessed 1/3/2017.) U.S. Department of Justice.
This webpage describes the incidents and the agency’s efforts at prevention. The page provides links to in-depth reports, statistics, guides, after-action reports of recent incidents (including the school shooting at Sandy Hook Elementary), planning guides, and the video geared towards the general public: “Run, Hide, Fight.”