The people who noticed were often family, friends, schoolmates, coworkers, neighbors, or associates.
cite page 74 Appendix IV: Prevent Mass Violence and Behavior Indicators
NCIER®
Observers of warning signs were often family, friends, coworkers or neighbors
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Federal Bureau of Investigation. (2026). Active Shooter Incidents in the United States in 2025 (p. 74). Claim p074-04, NCIER Claim Map. https://ncier.org/research/claim-maps/fbi-active-shooter-2025/claims/p074-04
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Federal Bureau of Investigation. (2026). Active Shooter Incidents in the United States in 2025 (p. 74). Claim p074-04, NCIER Claim Map. <a href="https://ncier.org/research/claim-maps/fbi-active-shooter-2025/claims/p074-04">https://ncier.org/research/claim-maps/fbi-active-shooter-2025/claims/p074-04</a>Link to https://ncier.org/research/claim-maps/fbi-active-shooter-2025/claims/p074-04 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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