Angelo Anthony Buono Jr. was an American serial killer, kidnapper and rapist who, together with his adopted cousin Kenneth Bianchi, were known as the Hillside Stranglers. Buono and Bianchi were convicted of killing ten young women in Los Angeles, California, between October 1977 and February 1978.

Kenneth Alessio Bianchi is an American serial killer, kidnapper, and rapist. He is known for the Hillside Strangler murders committed with his cousin Angelo Buono Jr. in Los Angeles, California, as well as for murdering two more women in Washington by himself. Bianchi is currently serving a sentence of life imprisonment in Washington State Penitentiary for these crimes. Bianchi was also at one time a suspect in the Alphabet murders, three unsolved murders in his home city of Rochester, New York, from 1971 to 1973.