October 12th, 1978 - New York Police discover the lifeless body of 20 year-old Nancy Spungen. Ex-prostitute, sometime stripper, heroin addict and infamous girlfriend of Sex Pistols' 21-year-old bass guitarist Sid Vicious. Dressed in her underwear, Spungen bled to death from a stab wound. Incredibly, Vicious was pronounced guilty of her murder in a trial-by-media by noon the following day. However, due to his own death within six months from a heroin overdose, the case never came to trial. In Who Killed Nancy? Director Alan G Parker, with 17 published books to his name, including the best selling "Vicious: Too Fast to Live" goes on a journey to discover the truth and... Who Killed Nancy? Why were New York's Police Investigators so unconvinced of Vicious' guilt? With many revealing interviews, Who Killed Nancy? also includes unseen footage of the Sex Pistols in concert.