277 Active Shooter Incidents in the United States Between 2000-2018 (Casualty Bar Chart) A bar chart representing the 277 active shooter incidents that have occurred in the U.S. between 2000 and 2018, separated by casualty breakdown per year. Download file quick-look-casulaty-breakdown-per-year-bar-chart-2018.pdf — 19 KB Loading The Document Viewer requires that you enable Javascript.