Oleg Yurievich Chizhov (in some sources mistakenly called Andrey Kryukov) (Russian: Олег Юрьевич Чижов; born 14 March 1970), known as The Birsky Maniac (Russian: Бирский маньяк), is a Russian rapist and serial killer. He committed a series of brutal murders, committing one of the crimes with accomplices.

Theresa Jimmie Francine Knorr (née Cross; born March 14, 1946) is an American woman convicted of torturing and murdering two of her six children while using the others to facilitate and cover up her crimes. She was acquitted of murdering her first husband and was also considered a suspect in the unsolved murder of her sister Rosemary Norris.

Vyacheslav Kirillovich Ivankov (Russian: Вячесла́в Кири́ллович Иванько́в; 2 January 1940 – 9 October 2009) was a Russian mafia boss and thief in law who was believed to have connections with Russian state intelligence organizations and their organized crime partners. He operated in both the Soviet Union and the United States.