They may have discovered the identity of the Zodiac killer. And David Fincher was wrong.

“The identity of the Zodiac Killer is Jack Tarrance. He’s my stepfather,” says Dennis Kaufman.

Of course, Kaufman also has this to say about a knife he found in his late stepfather’s possessions. “It could be a knife he barbecued with or a knife he murdered someone with.”

I’ll wait for official lab results …