FBI Study of Active Shooter Incidents in the United States Between 2000 and 2013
From 2000 to 2013, 160 ‘active shooter’ incidents have occurred in 40 of 50 states and the District of Columbia. The casualties of these shootings, both victims killed and wounded, have totaled 1,043. Nearly 40% of these active shooter incidents can be defined as a “mass killing” (“three or more”...