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Mass murder
References & Edit History Related Topics
Images
Grief at Columbine Infographic showing mass shootings in the United States since 1982, including a US map of locations, annual counts, fatality numbers, weapon types, shooter demographics, and a timeline of major incidents. Black-and-white photo of the University of Texas clock tower with smoke rising from a window below the clock, marking the location of the 1966 sniper attack by Charles Whitman.

Mass murder: References & Edit History

Article Contributors

Primary Contributors

  • Don Vaughan
    Don Vaughan is a freelance writer based in Raleigh, North Carolina.

Other Encyclopedia Britannica Contributors

Article History

Type Description Contributor Date
Article title updated for style. Nov 01, 2026
Invalidated site: Open Oregon Educational Resources - Mass Murder. Sep 29, 2026
Link added. Feb 19, 2025
Add new Web site: OpenStax - Population Health for Nurses - Mass Violence. Jan 11, 2025
Add new Web site: National Center for Biotechnology Information - PubMed Central - An Analysis of Motivating Factors in 1,725 Worldwide Cases of Mass Murder Between 1900?2019. Nov 15, 2024
Add new Web site: Open Oregon Educational Resources - Mass Murder. Nov 29, 2023
Add new Web site: Academia - Mass Murder. Sep 20, 2023
Added cross-reference. May 15, 2023
New article added. Apr 04, 2023
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