Serial killer: Although a serial killer

Although a serial killer is a distinct classification that differs from that of a mass murderer, spree killer, or contract killer, there are overlaps between them. What Defines Serial Killer? At its core, serial killer refers to the unlawful killing of two or more victims by the same offender (s), in separate events, usually over a period of time. The FBI’s definition includes a cooling-off period between murders, distinguishing it from mass or spree killings. Serial killers—defined as individuals who commit three or more separate murders with cooling-off periods between each crime—have become subjects of extensive academic study, media coverage, and public fascination. According to the world population review, United States has recorded the highest number of serial killers. However India too has seen its share of gruesome tales of crime and serial killers.