ABSTRACT
A homicide is the killing of one human being by another. Double homicides involve two victims in a single incident and a triple involves three. Although the phrases 'mass murderer' and 'serial killer' more closely describe circumstances than criminal types, specific psychological factors do distinguish these groups. Langman looked at forty-eight cases of school shootings in several countries and divided them into categories, according to personality factors: psychopathic, psychotic, and traumatized. Roche, a former secret service agent who spent fifteen years conducting assessments on people threatening to engage in targeted violence, has amassed a lot of material on mass murders, especially shooters. The most familiar type of serial killer is the lust murderer, like Bundy. Artistry is among the most rare of all motives for serial murder. Research reveals different motives and methods, as well as diverse states of mind for mass murderers and serial killers. Mass murderers have more homogenous backgrounds and tend to be emotionally reactive.
