Kenneth Alessio Bianchi (born May 22, 1951) is an American serial killer, kidnapper, and rapist. He is known for the Hillside Strangler murders which he committed with his cousin Angelo Buono Jr. in Los Angeles in 1977, as well as for two more murders in Washington State as the sole perpetrator. Bianchi is currently serving a sentence of life imprisonment in Washington State Penitentiary for these crimes. He 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. Bianchi was most recently denied parole in 2025.