The allegations come from a man named Dennis Kaufmann, who believes his deceased stepfather to be the notorious killer:
Scary indeed are the indications that brought Kaufmann to his accusations. After a phone conversation, in which Jack Tarrance seemingly admitted to be the Zodiac Killer, Kaufmann went through Tarrances stuff after his passing away -- and found something:
A (possibly) blood-stained knife. And a black hood with a zodiac sign on it. The kind the perpetrator wore for the Lake Berryessa killings.
Furthermore Tarrance eerily resembles police sketches from that time, and even has handwriting that matches closely.
Since this is not real Fincher news, let me show you, why I believe it is still relevant and interesting to Fincher's "Zodiac": In the movie, David Fincher and screenwriter James Vanderbilt go to great lengths to show the hardship everyone chasing the killer had to go through, and for once (in the movies), the good guys are not able to catch the bad guy. The filmmakers (in their own words) try carefully not to condemn anyone, while they do lay a strong case against main suspect Arthur Lee Allen. If now real-life evidence pointed to and possibly convicted a man, who was not even discussed in the movie, that adds yet another chilling layer to the story. For once, of course, because the killer may turn out to be one, who wasn't even on police's radar yet. But more importantly because it would add a powerful thematic nuance: in showing just how suspicious an "innocent" person such as Arthur Lee Allen can become due to circumstancial evidence.
At any rate, if the Zodiac Killer would now finally get identified, I guess it will not put a closing chapter to the case (and Fincher's film). Instead it will create a whole new angle of looking and interpreting the entire story, and especially give Fincher's thoughtful and procedural approach even more meaning and impact ... And hey -- it may just make for a great sequel!
Thanks, Christophe and Angelo, for the links: