If you are worried that someone you know may be displaying concerning behaviors, the most important thing is to tell someone. Be the key to preventing violence by talking to someone you trust.
cite page 74 Appendix IV: Prevent Mass Violence and Behavior Indicators
APA
Federal Bureau of Investigation. (2026). Active Shooter Incidents in the United States in 2025 (p. 74). Claim p074-10, NCIER Claim Map. https://ncier.org/research/claim-maps/fbi-active-shooter-2025/claims/p074-10
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