A cartoonist teams up with an ace reporter and a law enforcement officer to track down an elusive serial killer.
- Genre: Crime, Drama, Mystery, Thriller
- Studio: Paramount, Phoenix Pictures, Warner Bros. Pictures
- Keyword: california, san francisco, california, killing, journalist, newspaper, 1970s, victim, code, investigation, police, murder, serial killer, crime scene, reporter, whodunit, young man, fourth of july, newspaper article, 1960s, zodiac killer, san francisco, young girl, young girls, california, usa, psycho california, san francisco california, usa, san francisco, usa
- Cast: Jake Gyllenhaal, Mark Ruffalo, Robert Downey Jr., Anthony Edwards, Chloë Sevigny, John Carroll Lynch