Watch Full Movies Who Killed Nancy? Online for FREE in HD 720p on 123Movies. Download Who Killed Nancy? 123movies new website. On October 12th, 1978, New York Police discovered the lifeless body of a young woman, slumped under the bathroom sink in a hotel room. She was Nancy Spungen, an ex-prostitute, sometimes stripper, heroin addict, and girlfriend of Sex Pistols' bassist Sid Vicious.