Denise Green: one misread character, held at gunpoint
A plate reader misread one character of Denise Green's license plate — a 3 as a 7 — matching a stolen truck. Officers stopped her burgundy sedan, ordered her out at gunpoint, and handcuffed her, without visually confirming the plate or noticing that the vehicle did not match.
Denise Green was a 47-year-old city employee with no criminal record, driving home down Mission Street at about 11:15pm. She passed a patrol car fitted with a plate reader. The reader misread a single character of her plate, producing a number registered to a grey GMC truck that had been reported stolen.
Green was driving a burgundy Lexus sedan.
An officer initiated a high-risk stop without visually comparing the plate to the vehicle in front of him, and without registering that a burgundy sedan is not a grey truck. Multiple officers held her at gunpoint, ordered her out of the car, and handcuffed her.
Why this case is the anchor
Every element of the failure is documented in a published federal appellate opinion, and each one is structural rather than personal:
- The machine made an ordinary error. Optical character recognition confuses similar glyphs. That is not a defect to be fixed in the next version; it is a property of reading characters from a moving vehicle at night.
- The alert was treated as probable cause rather than as a lead. The system produced a hit, and the hit substituted for the officer’s own observation.
- The obvious contradiction went unchecked. The vehicle in front of the officer did not match the vehicle the alert described, in type or colour.
This is the mechanism that the phrase “it’s just a plate number” obscures. A plate number becomes a stop, and a stop becomes a gun pointed at someone who has done nothing.
Outcome
The Ninth Circuit revived her civil rights claim, and the City settled for $495,000. It remains the foundational case on the danger of treating an automated alert as probable cause.