Leszek Jacek Pękalski, known as The Vampire of Bytów (born 12 February 1966) is a Polish murderer and suspected serial killer. He is believed to have killed at least 17 people between 1984 and 1992.

Anthony "Tony Ducks" Corallo (born Antonio Corallo, Italian: [anˈtɔːnjo koˈral.lo]; February 12, 1913 – August 23, 2000) was an American mobster and boss of the Lucchese crime family in New York City. Corallo exercised tremendous control over trucking and construction unions in New York.

Maurice Meyssonnier was a Chief executioner in French Algeria. Meyssonnier family is linked to executioners as far back as the 16th century.

Josef Blösche (12 February 1912 – 29 July 1969) was a German war criminal and a member of the Nazi Party who served in the SS and SD during World War II. Blösche personally executed many Jews, participated in several massacres, and helped send many more to their deaths in extermination camps.

Colin Campbell Norris (born 12 February 1976) is a British serial killer who was convicted of the murder of four elderly patients and the attempted murders of two others in two hospitals in Leeds, England, in 2002.

Dean Arnold Corll (December 24, 1939 – August 8, 1973) was an American serial killer and sex offender who abducted, raped, tortured and murdered at least 29 teenage boys and young men between 1970 and 1973 in Houston and Pasadena, Texas. He was aided by two teenaged accomplices, David Owen Brooks and Elmer Wayne Henley.

Wilhelm Hermann Pfannenstiel (12 February 1890 – 1 November 1982) was a German physician, member of the Nazi Party from 1933, (NSDAP 2828629), and SS officer from 1934, (SS-Standartenführer, SS-No. 273083).

Sigmund Rascher (12 February 1909 – 26 April 1945) was a German Schutzstaffel (SS) doctor. He conducted deadly experiments on humans pertaining to high altitude, freezing and blood coagulation under the patronage of Reichsführer-SS Heinrich Himmler, to whom his wife Karoline "Nini" Diehl had direct connections.

Between 2002 and 2004, Ariel Castro abducted Michelle Knight, Amanda Berry, and Gina DeJesus from the roads of Cleveland, Ohio, United States, and later held them captive in his home at 2207 Seymour Avenue in the city's Tremont neighborhood. All three young women were imprisoned at Castro's home until 2013, when Berry successfully escaped with her six-year-old daughter, to whom she had given birth while captive, and contacted the police.