Why is This Important?
Most active shooter incidents don’t happen without warning. Attackers often show signs before acting violently. As a security guard, knowing these warning signs can help prevent an attack before it starts.
🔹 Common Warning Signs of Potential Violence
1. Verbal Threats & Aggressive Language
- Making direct or indirect threats about harming people.
- Talking about violence, weapons, or past attacks.
- Expressing extreme anger at co-workers, bosses, or customers.
- Saying things like:
- “One day, they’ll regret how they treated me.”
- “I should just bring a gun in here.”

2. Extreme Anger or Sudden Mood Changes
- Uncontrolled outbursts, yelling, or aggressive behavior.
- Holding grudges and talking about “getting even”.
- Reacting violently to minor issues.
3. Obsession with Weapons or Violence
- Talking frequently about guns, bombs, or attacks.
- Bringing weapons to the workplace.
- Posting violent threats on social media.
- Admiring or studying past mass shootings.
4. Personal Problems & Increased Stress
- Recent job loss, financial problems, or family issues.
- Increased drug or alcohol use.
- Withdrawn behavior—stopping social interaction or acting depressed.
- Sudden changes in appearance, hygiene, or personality.
5. Suspicious Behavior or Actions
- Loitering or pacing in restricted areas.
- Asking unusual security-related questions (e.g., “Where are the exits?” “How often do guards patrol?”).
- Taking photos or videos of security cameras, doors, or restricted areas.
- Testing security responses—setting off alarms or making fake threats.
🔹 What Should a Security Guard Do?
1. Observe & Document the Behavior
✔ Take notes on what was said, done, or reported.
✔ Pay attention to patterns—a single bad day is not the same as repeated violent talk.
2. Report Suspicious Activity
✔ Notify supervisors or law enforcement if behavior seems dangerous.
✔ If unsure, follow the rule: “If you see something, say something.”
3. De-Escalate When Possible
✔ If safe, try to calm the person down with a non-threatening tone.
✔ Avoid arguing, threatening, or making the person more aggressive.
4. Prepare for Possible Action
✔ Know your emergency procedures in case the situation escalates.
✔ Be ready to evacuate, lock down, or alert others if needed.
🔹 Early Action Saves Lives
Recognizing warning signs before an attack happens gives security guards a chance to prevent violence. Trust your instincts, stay alert, and always report concerns—it could save lives.