Zodiac: The Watch and the Windshield
In David Fincher’s Zodiac (2007), the procedural investigation into Arthur Leigh Allen (John Carroll Lynch) is defined by physical artifacts. During Allen’s interrogation at the Vallejo refinery, detectives Dave Toschi and Bill Armstrong observe three independent physical details in rapid succession:
- The Zodiac Wristwatch: Allen wears the exact Sea Wolf model featuring the crosshair circle logo adopted by the killer in his letters to the San Francisco Chronicle.
- The Royal Typewriter Ribbon: Allen casually remarks that his favorite typewriter had an Elite type font matching the letters, unprompted by investigators.
- The Wing-Walker Boots: Footprints at Lake Berryessa matched size 10½ military surplus boots; Allen admits he purchased surplus footwear after naval service.
Yet Fincher's ultimate forensic statement is that circumstantial alignment is not legal certainty. Despite thirteen points of alignment, Allen's fingerprints and handwriting never matched the Vallejo evidence. The mystery remains open by design.