20th-century American murderers

American serial killer (1927-1959)

American Mafia boss (1910-1979)

American murderer and hitman, father of Woody Harrelson (1939–2007)

Richard Benjamin Speck was an American mass murderer who killed eight student nurses in their South Deering, Chicago, residence by stabbing, strangling, slashing their throats, or a combination of the three on the night of July 13–14, 1966. Speck also raped one victim before killing her. A ninth potential victim, student nurse Corazon Amurao, survived by hiding beneath a bed.

Convicted killer (1900–1933)

American murderer (1895-1928)

American serial killer (1932-1984)

three teenage boys convicted of the 1993 murders of three boys in West Memphis, Arkansas

American serial killer (1962–2019)

Hong Kong serial killer in United States detainment

American serial killer and rapist (1953-2019)

American serial killer

American serial killer

American serial killer (1947–1996)

American serial killer (1905–1965)

Nurse convicted of killing patients

American serial killer (1906–1938)

American criminal and convicted rapist (1931–1973)

American murderer (1954–2006)

American gangster (1931–1996)

American murderer (1959–1998)

American serial killer (1892–1938)

American serial killer

American Serial Killer (1943–1999)

American criminal

American sportsperson, veterenarian, and executed murderer (1879–1930)

American serial killer

American serial killer (1933–1991)

American best known for surviving a failed execution by electrocution in the United States

American domestic terrorist

convicted murderer (1923-1955)

American jazz trombonist (1926–1978)

American criminal who received the death penalty for murder in 1985

American murderer (1940–2020)

American serial killer (1945–1985)

FBI agent (1920-1970)

American serial killer (1934-2002)

American serial killer (1951–1998)

serial killer

American quack, fraud, swindler and serial killer (1867-1938)

American mass murderer (1928-1952)

American serial killer (1968-1997)

American serial killer (1946–1995)

Canadian-American serial killer

American White Supremacist and murderer (1920-2001)

Convicted murderer

series of murders committed in Atlanta, Georgia

American murderer

American Mafia hitman (1940-1983)

Armenian engineer (1895–1984)

Australian serial killer (1945–1984)

American spree killer

American serial killer

American serial killer (1947-1996)

American female serial killer

American serial killers

former Ku Klux Klan organizer convicted of three counts of manslaughter (1925-2018)

Italian-American mobster (1917–2020)

American serial killer (1929-2011)

American outlaw