To help make these distinctions clear, the following chart differentiates the characteristics of active shooter attacks, mass shootings, and mass killings.
cite page 70 Appendix I: Active Shooters vs Mass Shooting vs Mass Killing
NCIER®
Chart contrasts characteristics of active shooter attacks, mass shootings and mass killings
How to cite
APA
Federal Bureau of Investigation. (2026). Active Shooter Incidents in the United States in 2025 (p. 70). Claim p070-04, NCIER Claim Map. https://ncier.org/research/claim-maps/fbi-active-shooter-2025/claims/p070-04
HTML
Federal Bureau of Investigation. (2026). Active Shooter Incidents in the United States in 2025 (p. 70). Claim p070-04, NCIER Claim Map. <a href="https://ncier.org/research/claim-maps/fbi-active-shooter-2025/claims/p070-04">https://ncier.org/research/claim-maps/fbi-active-shooter-2025/claims/p070-04</a>Link to https://ncier.org/research/claim-maps/fbi-active-shooter-2025/claims/p070-04 from your own pages; it resolves to this claim and its highlighted source passage.
License: CC BY 4.0. Free to reuse with attribution: credit NCIER Claim Map and link to the claim.
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