Study of the Pre-Attack Behaviors of Active Shooters in the United States Between 2000 and 2013: Quick Reference Guide   [open pdf - 1016KB]

From the Reminders: "[1] There is no one 'profile' of an active shooter. [2] There is no single warning sign, checklist, or algorithm for assessing behaviors that identifies a prospective active shooter. [3] While impossible to predict violent behavior, it is possible to prevent some attacks via effective threat assessment and management strategies."