25 Warning Signs of Workplace Violence Risk

This article is designed as a brief guideline to assist you in creating greater awareness of workplace violence issues. This information will help in recognizing some of the warning signs and provides a brief review for post-employment termination. This article is not intended to be comprehensive and is not a training manual.

There are myriad issues involved in workplace-related violence. We strongly recommend that you consult with professional security experts that are capable of performing threat risk assessments any time that you become aware of someone exhibiting threatening, bizarre, or hostile behavior. Other concerns may include expressing suicidal thoughts, searching for weapons online at work, or desire to injure or harm people at work.

There are numerous instances where these types of warning signs were ignored in the workplace and  which became active shooter situations that may have been diffused or prevented.

Recognizing the Warning Signs: 25 Red Flags

The following is a list of 25 red flag issues that may indicate increased potential for violence, however, this is not intended to be a comprehensive list. This information must be evaluated in combination with various other factors known about the person and should include a detailed background check, including criminal history, various public records, personal behaviors, any unusual or bizarre statements, and threats made (if any).

Threat risk assessments should be made by security specialists, law enforcement, or workplace trauma/forensic psychologists with specific experience in assessing workplace violence. These items, in various combinations, are often red flags regarding characteristic behaviors of potentially violent and threatening employees:

25 Red Flags

History of prior violence (including domestic violence)

Bullying & intimidating behavior

Emotionally unstable behaviors

Exhibiting paranoia concerning co-workers & others (belief that others constantly watching or talking about them)

Have mentioned they have stopped taking medications for personality disorders

Expressed interest in weapons (Note: all weapons should be taken seriously including high velocity archery sets, guns, knives, glass, etc.)

High degree of interest in military, law enforcement and other groups (may include hate groups and survivalist groups)

Verbalized approval of prior violent or aggressive incidents carried out by others

Frequently blaming others for their issues

Deteriorating work habits

Increasing or escalating performance issues

Escalating distraction & extreme nervousness

Poor personal hygiene (especially deteriorating personal habits)

Financially pressured and/ or high personal stress: recent death, in a messy divorce or child custody battle, home foreclosure, etc.

Prior issues with law enforcement (resisting arrest, evading police, road rage, concealed weapons violations, substance abuse, etc.)

“Loner” behavior (socially self-isolating)

Force their beliefs on others; spreading rumors/ gossip to elevate their own position

Argumentative, unreasonable & disparaging behavior

Constantly protesting about their boss/ the company/ filing multiple claims of unfair treatment

Makes verbal or written threats:

  • Direct threats: “I’m going to kill you at work in front of your friends”.
  • Veiled threats: “I’ll get him someday”, “I know where you take your kids to school”, “I know where you jog every morning”

Addiction behaviors: alcohol, drugs (street or prescribed), obsessive romance

Harassing others regularly or frequently

Lacking basic people skills

Say they feel hopeless often or feel suicidal

Wants to bring a briefcase or purse into an exit interview & will not voluntarily part with the item.

Follow up:

  1. Always err on the side of caution & use armed security presence if you have any concerns
  2. Never meet with a terminated employee in person. Conduct any meetings via conference call.
  3. Identify who will follow up with employee post-termination event; this is an important step that should not be overlooked.
  4. Conduct Debrief Session: Identify what worked well and what improvements are needed for future threat situations


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