Erna Wallisch (née Pfannstiel, 10 February 1922 – 16 February 2008) was a female guard in two Nazi concentration camps, but despite several trials was never convicted. In 2007, she was seventh on the Simon Wiesenthal Center's list of most wanted war criminals that had never been convicted.

Waldemar Hoven (10 February 1903 – 2 June 1948) was a Nazi physician at Buchenwald concentration camp, and convicted war criminal for conducting human experiments regarding typhus which led to the deaths of many concentration camp prisoners, and as one of the organizers of the euthanasia program Aktion T4; this Nazi initiative resulted in the systematic murder of 275,000 to 300,000 disabled people. He was sentenced to death and hanged on 2 June 1948.

Angelo Meli (Italian: [ˈandʒelo ˈmɛːli]; February 10, 1897 – December 1, 1969) was an Italian-American mobster who became a consigliere and then leading Chairman of the Detroit Partnership criminal organization of La Cosa Nostra.

José Gabriel da Costa, later known as Mestre Gabriel, (1922–1971), is the founder of the União do Vegetal, a religion with Christian and reincarnationist foundations that considers Hoasca (more commonly referred to as "ayahuasca") to be its main sacrament. This beverage is made by boiling two plants, Mariri (Banisteriopsis caapi) and Chacrona (Psychotria viridis), both of which are found in the Amazon rainforest.

Howard Arthur Allen (February 10, 1949 – June 5, 2020) was an American serial killer from Indianapolis, Indiana. He murdered three elderly people and also committed assault, burglary, and arson.

Alexander Yuryevich Pichushkin (Russian: Алекса́ндр Ю́рьевич Пичу́шкин; born 9 April 1974), also known as the Chessboard Killer (Убийца с шахматной доской) and the Bitsa Park Maniac (Битцевский маньяк), is a Russian serial killer and former warehouse worker who is believed to have killed at least forty-nine people, and possibly as many as sixty, between 1992 and 2006. Pichushkin was active in Moscow's Bitsa Park, where a number of the victims' bodies were found.