Niklaus Barbie (25 October 1913 – 25 September 1991) was a German officer of the Schutzstaffel and Sicherheitsdienst who worked in Vichy France during World War II. He became known as the "Butcher of Lyon" for having personally tortured prisoners—primarily Jews and members of the French Resistance—as the head of the Gestapo in Lyon.

Maury Troy Travis (October 25, 1965 – June 10, 2002) was an American serial killer. Travis was named in a federal criminal complaint for the murders of two women.

Kazuo Nakanishi (中西 一男, Nakanishi Kazuo; October 25, 1922 – September 1, 2003) was briefly the leader of the Yamaguchi-gumi yakuza syndicate in the chaotic years of the Yama–Ichi War. He was also the founder and 1st kumicho of the Nakanishi-gumi.

Nikolai Nikolaevich Kozlenya (Russian: Никола́й Никола́евич Козле́ня; born 25 October 1971) is a Russian criminal and serial killer, who in the period between 1998 and 2001 committed 7 murders and several other attempted murders against drivers, with the aim of seizing their vehicles.

Tse Chi Lop (Chinese: 謝志樂, born 25 October 1963) is a Chinese and Canadian gangster, drug trafficker and drug cartel leader. Before his arrest, Tse was the alleged drug lord behind Asia-Pacific based international crime syndicate Sam Gor, also referred to as "The Company", and a former member of the Hong Kong, Toronto and Vancouver-based triad crime group Big Circle Gang.

Arnfinn Nesset (25 October 1936 – 2 December 2025) was a Norwegian nurse and nursing home manager who was a convicted serial killer. His crimes include the murders of at least 22 people, as well as attempted murder, document forgery, and embezzlement.

Miguel Cortés Miranda (25 October 1984 – 13 April 2025), known as The Monster of Iztacalco (Spanish: El monstruo de Iztacalco), was a Mexican suspected serial killer and bacteriological chemist who was implicated in the rape and murder of at least three young girls and women in Mexico City, all of which occurred between 2012 and 2024.

James Brown Miller (October 25, 1861 – April 19, 1909), also known as "Killin' Jim", "Killer Miller" and "Deacon Jim", was an American outlaw and title-holder gunfighter of the American Old West, said to have killed 12 people during gunfights. Miller was referred to by some by the alias "Deacon Jim" because he regularly attended the Methodist Church, and he did not smoke or drink.