Initially, San Francisco police Inspector Dave Toschi suspected the Zodiac Killer may have perpetrated the Furlong/Snoozy murders.
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David Fincher planned to make a film about the murders after making a movie about another unidentified serial killer, known as Zodiac.
On the flight home, he and Mfume discover that Evan Markham is, in fact, the Faceless Man while Sondra Avebury is the rogue soul enabling Markham to kill his victims with a minimum of struggle; together, the two of them slowly developed the "Violet Killer" modus operandi by appropriating details of famous serial killers (Jack the Ripper's ritual disembowlment, the Zodiac Killer's letters to the media; Jeffrey Dahmer's collection of body parts).
One member of the editorial collective of Good Times, a resident of the Good Times Commune named Richard Gaikowski (1936–2004), has been identified by the History Channel's 2009 television program MysteryQuest as a possible suspect in the unsolved San Francisco Zodiac Killer case, although there is only circumstantial evidence (including alleged clues planted in Good Times) tying him to the case.