Frank Gust (born 24 May 1969) is a German serial killer. He has been dubbed The Rhine-Ruhr Ripper by the media because his actions, mainly committed in the Rhine-Ruhr region in western Germany, share similarities with London's Jack the Ripper murders.

Donise David Barksdale (May 24, 1947 – September 2, 1974), also known as King David, was an American gangster and activist from Chicago, Illinois. He was the founder of the Black Disciples.

Hilda Nilsson (24 May 1876 – 10 August 1917) was a Swedish serial killer from Helsingborg who became known as "the angel maker on Bruks Street". She is one of Sweden's most notorious female serial killers.

John Clarence Woods (June 5, 1911 – July 21, 1950) was a United States Army master sergeant who, with Joseph Malta, carried out the Nuremberg executions of ten former top leaders of Nazi Germany on October 16, 1946, after they were sentenced to death at the Nuremberg trials. Time magazine credited him with 347 executions to that date during a 15-year career.

Nathuram Vinayak Godse (19 May 1910 – 15 November 1949) was an Indian Hindu nationalist and political activist who assassinated Mahatma Gandhi. He shot Gandhi in the chest three times at point blank range at a multi-faith prayer meeting in Birla House in New Delhi on 30 January 1948.

Vincent "Jimmy Blue Eyes" Alo (May 26, 1904 – March 9, 2001) was a New York mobster and a high-ranking capo in the Genovese crime family who set up casino operations with mob associate Meyer Lansky in Florida and Cuba.

Isaac Franklin (May 26, 1789 – April 27, 1846) was an American slave trader and plantation owner. Born to wealthy planters in what would become Sumner County, Tennessee, he assisted his brothers in trading slaves and agricultural surplus along the Mississippi River in his youth, before briefly serving in the Tennessee militia during the War of 1812.

Daniel Harold Rolling (May 26, 1954 – October 25, 2006), known as the Gainesville Ripper, was an American serial killer who murdered five college students in Gainesville, Florida over four days in August 1990.

Giuseppe Sasia (26 May 1886 – 17 February 1936), known as The Shepherds' Killer and The Haut-Var Killer, was an Italian criminal and serial killer, who, in several months in 1934, killed at least 4 men in Draguignan, France, with the aim of stealing from them. He was later guillotined for his crimes.

Peter Kürten (German: [ˈpeːtɐ ˈkʏʁtn̩]; 26 May 1883 – 2 July 1931) was a German serial killer, known as The Vampire of Düsseldorf and the Düsseldorf Monster, who committed a series of murders and sexual assaults between February and November 1929 in the city of Düsseldorf. In the years before these assaults and murders, Kürten had amassed a lengthy criminal record for offences including arson and attempted murder.

Robert Lee Yates Jr. (born May 27, 1952), also known as the Spokane Serial Killer and the Grocery Bag Killer, is an American serial killer, kidnapper, rapist, necrophile, and former U.S.

Elisabeth Marschall (May 27, 1886 – May 3, 1947) was the head nurse (Oberschwester) at the Nazi Ravensbrück concentration camp and was executed after the Hamburg Ravensbrück trials.

Thomas Neill Cream (27 May 1850 – 15 November 1892), also known as the Lambeth Poisoner, was a Scottish-Canadian medical doctor and serial killer who poisoned his victims with strychnine. Cream murdered up to ten people in three countries, targeting mostly lower-class women, sex workers and pregnant women seeking abortions.

Henry-Clément Sanson (27 May 1799 – 25 January 1889) was a French executioner. He held the position of Royal Executioner of the City of Paris, serving King Louis-Philippe I from 1840 to 1847.

Michael Franzese Sr. () (né Grillo; born May 27, 1951) is an American former mobster who was a caporegime in the Colombo crime family in New York City, and son of former underboss Sonny Franzese.

Wayne Bertram Williams (born May 27, 1958) is an American convicted murderer and suspected serial killer who is serving life imprisonment for the 1981 killings of two men in Atlanta, Georgia. Although never tried for the additional murders, he is also believed to be responsible for at least twenty-four of the thirty Atlanta murders of 1979–1981, also known as the Atlanta Child Murders.

Ernest Martin "Ernie" Ingenito (May 27, 1924 – October 7, 1995) was an American spree killer who shot nine people, his wife Theresa Mazzoli and her family, killing five and injuring four, on November 17, 1950, in Franklin Township and Minotola, New Jersey.

Arbi Alautdinovich Barayev (Chechen: Арби Алаутдинович Бараев; 27 May 1974 – 22 June 2001) was a Chechen warlord who in 1996 became the founder and first leader of the Special Purpose Islamic Regiment (SPIR) in Chechnya.

Emil Max Hödel (27 May 1857 – 16 August 1878) was a German tinsmith and anarchist from Leipzig. He is best known for committing the Hödel assassination attempt on Kaiser Wilhelm I, one of the first instances of propaganda by the deed in history.

Henry Alfred Kissinger (May 27, 1923 – November 29, 2023) was an American diplomat, political scientist, and politician. He served as the 7th national security advisor from 1969 to 1975, followed by being the 56th United States secretary of state from 1973 to 1977.

Santo Trafficante Sr. (May 28, 1886 – August 11, 1954) was a Sicilian-born mobster, and father of the powerful mobster Santo Trafficante Jr.

Edwin F. Davis (May 28, 1846 – May 26, 1923), of Corning, Steuben County, New York, United States, was the first "state electrical engineer” (executioner) for the state of New York.

François Marcantoni (28 May 1920 – 17 August 2010) was a Corsican gangster and member of French Resistance. He died on 17 August 2010, aged 90 in Paris.

Dai Li (Chinese: 戴笠; pinyin: Dài Lì; 28 May 1897 – 17 March 1946), courtesy name Yunong, was a Chinese lieutenant general and spymaster. Dai was born in Jiangshan, Zhejiang and later studied at the Whampoa Military Academy, where Chiang Kai-shek served as Chief Commandant, and later became head of the Bureau of Investigation and Statistics (BIS) within the Nationalist government of the Republic of China (ROC).

Joseph-Ignace Guillotin (French: [ʒozɛf iɲas ɡijɔtɛ̃]) (28 May 1738 – 26 March 1814) was a French physician, politician, and freemason who proposed on 10 October 1789 the use of a device to carry out executions in France, as a less painful method of execution than existing methods. Although he did not invent the guillotine and opposed the death penalty, his name became an eponym for it.

Silvo Plut (29 May 1968 – 28 April 2007) was a Slovenian serial killer. He was sentenced to 30 years in prison for the murder of Ljubica Ulčar and the attempted murder of her husband Miro Ulčar on 24 February 2006.

Thomas Gagliano (born Tommaso Gagliano, Italian: [tomˈmaːzo ɡaʎˈʎaːno]; May 29, 1883 − February 16, 1951) was an Italian-born American mobster and boss of what U.S. federal authorities would later designate as the Lucchese crime family, one of the "Five Families" of New York City.

Fred "Killer" Burke (May 29, 1893 – July 10, 1940) was an American armed robber and contract killer responsible for many crimes during the Prohibition era. He was considered a prime suspect in the Saint Valentine's Day Massacre of 1929.

Gary Leon Ridgway (born February 18, 1949), known as the Green River Killer or the Green River Strangler, is an American serial killer who was convicted of murdering forty-nine women between 1982 and 1998 in the northwestern United States. At the time of his arrest in 2001, he was believed to be the most prolific serial killer in United States history, according to confirmed murders.

Jenny-Wanda Barkmann (30 May 1922 – 4 July 1946) was a German overseer in Nazi concentration camps during World War II. She was tried and executed for crimes against humanity after the war.

Andrew Phillip Cunanan (August 31, 1969 – July 23, 1997) was an American spree killer who murdered five people over three months from April 27 to July 15, 1997. His victims include Italian fashion designer Gianni Versace and Chicago real estate developer Lee Miglin, as well as his former boyfriend David Madson and friend Jeffrey Trail.

Curtis Francis Warren (also known as Cocky; born 31 May 1963) is an English gangster and drugs trafficker who was formerly Interpol's Target One and was once listed on The Sunday Times Rich List.

Anthony John Hardy (31 May 1951 – 25 November 2020) was an English serial killer who was known as the Camden Ripper for beheading and dismembering some of his victims. In November 2003, he was sentenced to three life terms for three murders, but police believe he may have been responsible for up to six more.

Jean-Pierre Hernandez (31 May 1935 – 25 October 2024) was a French gangster and writer. A onetime caïd of the French Connection, he was imprisoned and lived in hiding for 13 years.

Anand Pal Singh (31 May 1975 – 24 June 2017) was an Indian gangster mainly active in the cities of Rajasthan. He was a most-wanted gangster with a reward of ₹10 lakh on his head.

The Bomb man of Pae street (Estonian: Pae tänava pommimees) was a notorious serial bomber, later identified as Märt Ringmaa (30 May 1938 – 30 June 2021), who was active in Lasnamäe, Tallinn, Estonia. Over ten years, twelve IEDs made by Ringmaa exploded in public places, leading to the death of seven people and injuring six.

Yigal Amir (born May 31, 1970) is an Israeli murderer who assassinated the incumbent prime minister of Israel, Yitzhak Rabin, on November 4, 1995, at the conclusion of a rally in Tel Aviv, Israel. At the time of the murder, he was a law student at Bar-Ilan University.