ABSTRACT
Unlike a serial killer, a mass murderer appears in an unexpected way, killing as many people as he or she can, and it is not unusual for him or her to finish his or her spree by committing suicide. American criminologists Ronald and Stephen Holmes, the mass murderer profile involves a significant family component (children of dysfunctional couples, child abuse, and drug and alcohol abuse), in conjunction with psychological alterations (suicidal tendencies, and poor frustration and anger management) and conditions that generate an explosive charge of resentment and hate in situations that only the murderer can understand. Some years ago, the worst civil massacre registered in the United States took place. Some researchers have pointed out other possible causes in the development of a murderer who has a psychopathic personality. Masters makes a risky statement: that there is an association between environmental pollution and crime rates.
