Makes threatening references to other incidents of violence
Recent major change in behavior, demeanor, appearance
Feels wronged, humiliated, degraded; wants revenge
Intimidating, verbally abusive, harasses or mistreats others
Upset over recent events (work or personal)
Feels entitled to special rights, feels that rules don't apply to him/her
Challenges/resists authority
Blames others for problems in life or work; suspicious, holds grudges
Morally superior, self-righteous
Is isolated or a loner
Believes to have no choices or options for action except violence
