Subject
Mass murder
13
Criminal snipers
4
Emergency management
3
Law enforcement Planning
3
Violence
3
Criminal psychology
2
Firearms and crime
2
Mass murderers
2
Mass murderers Psychology
2
Violent crimes
2
Campus violence
1
Colorado Theater Shooting, Aurora, Colo., 2012
1
Criminal behavior, Prediction of
1
Cults
1
Ex-cultists
1
Excavations (Archaeology)
1
Faculty
1
Firearms
1
Friends and associates
1
Gun control
1
Kidnapping
1
Mass murder History
1
Mass murder Psychological aspects
1
Mass murder investigation
1
Massacres History
1
Mental health personnel and patient
1
Murder Investigation
1
Murder Psychological aspects
1
Murder in mass media
1
Police
1
Psychologists
1
Psychopaths
1
School shootings
1
Serial murders
1
Spree murderers
1
Students
1
Suicidal behavior
1
Victims of crimes
1
Violence Prevention
1
Violence in mass media
1
Violence in the workplace
1
Virginia Tech Shootings, Blacksburg, Va., 2007
1