While some attacks can fall into more than one of these categories, not every mass shooting or mass killing meets the criteria of an active shooter incident.
cite page 70 Appendix I: Active Shooters vs Mass Shooting vs Mass Killing
NCIER®
Not every mass shooting or mass killing qualifies as an active shooter incident
How to cite
APA
Federal Bureau of Investigation. (2026). Active Shooter Incidents in the United States in 2025 (p. 70). Claim p070-03, NCIER Claim Map. https://ncier.org/research/claim-maps/fbi-active-shooter-2025/claims/p070-03
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Federal Bureau of Investigation. (2026). Active Shooter Incidents in the United States in 2025 (p. 70). Claim p070-03, NCIER Claim Map. <a href="https://ncier.org/research/claim-maps/fbi-active-shooter-2025/claims/p070-03">https://ncier.org/research/claim-maps/fbi-active-shooter-2025/claims/p070-03</a>Link to https://ncier.org/research/claim-maps/fbi-active-shooter-2025/claims/p070-03 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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