Which country has the most serial killers? The first step of answering that question is defining the term "serial killer," whose origin is credited to multiple sources, including former FBI agent Robert Ressler, LAPD detective Pierce Brooks, and German criminologist Ernst Gennat. While the origin of the term "serial killer" may be slightly ambiguous, it is quite clear which country is home to the highest number of serial killers. The United States is the runaway leader in this category, with more documented serial killers in its history than the next ten closest countries combined.20 Countries with the Most Documented Serial Killers:*CountrySerial Killers (Radford)United States3,690United Kingdom196Russia164Japan138India130South Africa129Canada125Germany99Italy95Australia92* Data source: Radford University Serial Killer Information Center.Definition of a serial killerAt a 2005 symposium in San Antonio, TX, the FBI officially defined a serial killing as "the unlawful killing of two or m...
