In late 1977, Los Angeles was gripped by fear as bodies began appearing on hillsides across the city. Investigators believed they were hunting one killer—but the truth was far more disturbing. In this episode of Unsaid Case Files, we uncover the story of Kenneth Bianchi and Angelo Buono Jr.—two men whose partnership allowed them to evade detection while terrorizing a city. This is the case of the Hillside Strangler… and the truth no one saw coming.