Richard Benjamin Speck (December 6, 1941 – December 5, 1991) was an American mass murderer who killed eight student nurses in their South Deering, Chicago, residence via 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 of all eight murders on April 15, 1967, Speck was sentenced to death. His sentence was reduced to 400–1,200 years in 1972. This was later reduced to 100–300 years. Speck died of a heart attack while incarcerated at Stateville Correctional Center on the eve of his 50th birthday.