This is true, there is a major factual error. The Manson Family didn't kill Polanski. He wasn't home. He was in Polanski or um, Poland, or Europe anyway. And Manson might not have killed anybody. The book Helter Skelter was written by the prosecutor, Vincent Bugliosi who nailed him on CIRCUMSTANTIAL evidence only. Manson was supposedly the mastermind of the murders.

Bugliosi, to his credit and in his advancing age, also wrote the circumstantial case against George Bush for War Crimes for the invasions of Afghanistan and Iraq. That one didn't stick....yet.