This document summarizes the Hillside Strangler case involving cousins Angelo Buono and Kenneth Bianchi who murdered 10 women in Los Angeles between October 1977 and February 1978. It provides biographical details on Buono and Bianchi, descriptions of the 10 victims and causes of death, details of the investigation and manhunt for the killers, their trials, convictions, and sentences. Both men received life sentences, with Bianchi imprisoned in Washington and Buono imprisoned in California where he later died in prison.