Serial Killers

Argentina

• Cayetano Santos Godino – aka "Petiso Orejudo" ("Big Eared Midget"); at 16, killed four children in 1912; died in prison in 1944
• Robledo Puch – killed 11 people before his arrest in 1972; sentenced to life imprisonment in 1980

 Australia

• David and Catherine Birnie – couple responsible for the murders of four women
• Eric Edgar Cooke – killed at least seven people; last person to be hanged in Western Australia
• Paul Denyer – aka "Frankston Serial Killer"; murdered three women in 1993 in the Melbourne suburb of Frankston
• Peter Dupas – serving three life sentences for multiple murders and rape charges
• Kathleen Folbigg – murdered four of her infants
• Leonard Fraser – convicted of killing three people in Rockhampton, Queensland
• John Wayne Glover – aka "The Granny Killer"; killed six elderly women on Sydney's North Shore; committed suicide in 2005.
• Caroline Grills – aka "Auntie Thally"; serial poisoner of at least four family members
• Mark Jefferies – responsible for the murders of four people
• Eddie Leonski – aka "Brownout Strangler"; American serviceman who killed at least four people in Melbourne; executed on November 9, 1942
• William MacDonald – aka "the Mutilator"; killed at least five men between June 1961 and April 1963
• Ivan Milat – killed at least seven tourists in Belanglo State Forest, New South Wales; suspected in similar disappearances in Newcastle
• Truro murders (James Miller and Christopher Worrell) – convicted of killing six victims
• Snowtown murders (John Bunting, Robert Wagner, Mark Haydon, James Vlassakis) – convicted of, or assisted with, the murders of 11 people between 1992 and 1999

Austria

• Elfriede Blauensteiner – poisoner of three individuals
• Lainz Angels of Death (Maria Gruber, Irene Leidolf, Stephanija Meyer, Waltraud Wagner) – nurses at the Lainz General Hospital in Vienna who admitted to murdering 49 patients
• Jack Unterweger – author and sexual sadist; convicted of 10 murders; believed to have killed 12 women

 Belgium

• Marc Dutroux – child molester and killer
• András Pándy – aka "Vader Blauwbaard"; convicted of the murder and rape of his two wives and four children

 Brazil

• Abraão José Bueno‎ – nurse who killed four child patients
• Pedro Rodrigues Filho – aka "Pedrinho Matador"; convicted and sentenced to 128 years imprisonment for 70 murders; however, the maximum one can serve in Brazil is 30 years; claimed to have killed more than 100 victims, including 40 prison inmates
• Edson Isidoro Guimarães – nurse who killed four patients but suspected of 131 deaths in total
• Anísio Ferreira de Sousa – gynaecologist who was convicted of the murder of three children but linked to the disappearance of a total of 19

 Canada

• Paul Bernardo – aka the "Scarborough Rapist"; Ontario man who killed three teenage girls (including his wife's sister) with the aid of his wife Karla Homolka
• Wayne Boden – serial killer active from 1968–1971
• John Martin Crawford – convicted in 1996 for the murders of three women
• Léopold Dion – aka "Monster of Pont-Rouge"; raped and killed four young boys in 1960; murdered in 1972
• William Patrick Fyfe – convicted of killing five women in Montreal; suspect in several other murders
• Gilbert Paul Jordan – killed between eight and 10 women by alcohol poisoning
• Allan Legere – aka "Monster of the Miramichi"; killer of five individuals
• Clifford Olson – murdered 11 children in