According to Department of Homeland Security, an Active Shooter is an individual actively engaged in killing or attempting to kill people in a confined and populated area; in most cases, active shooters use firearms(s) and there is no pattern or method to their selection of victims.
PublicSafety/DHS_ActiveShooterBook-FAMU.pdf
Click on the link below to familiarize yourself with the Community Response Checklist in the event of an active shooter incident.
Community Response Checklist