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Jaikumar Vijayan | May 15, 2014

A federal appeals court this week ruled that a woman's Fourth Amendment rights may have been violated when San Francisco police arrested her after an automated license plate reader mistakenly identified her car as stolen.

A federal appeals court this week ruled that a woman's Fourth Amendment rights may have been violated when San Francisco police arrested her after an automated license plate reader mistakenly identified her car as stolen. The decision provides fodder to privacy advocates calling for restrictions on the use of the technology.

The U.S. Court of Appeals for the Ninth District Tuesday reversed a district court ruling saying the police made the arrest in good faith. A three-judge panel at the appellate court held that a reasonable jury could indeed find that the woman's Fourth Amendment rights against unreasonable search and seizure had been violated. The case was remanded back to the district court.

The case involves Denise Green, 47, who was stopped, handcuffed and detained briefly by multiple police officers with drawn guns, on a March night in 2009.

The incident was triggered when Green's car passed a police cruiser whose ALPR mistakenly determined that the vehicle was stolen. According to the appellate court's description of the incident, the photograph taken by the ALPR was blurry and illegible because of darkness.

The police officer operating the license plate reader radioed in a description of Green's vehicle and provided the incorrect license plate number from the ALPR read to dispatch. He did not confirm the tag number visually.

Dispatch quickly identified the plate as belonging to a stolen vehicle prompting a sequence of events that ended with Green being stopped by multiple police cars, handcuffed at gunpoint and detained while officers searched her car and person before letting her go.

Green filed a lawsuit against San Francisco Police Department, the city, county and the police officer in charge of the incident contending Fourth Amendment violations as well as unreasonable use of force and other charges. She asked the court for a summary judgment on her claims.

The U.S. District Court for the Northern District of California rejected Green's motion and agreed with the SFPD's assertion that they had acted under reasonable suspicion.

More here:
License reader lawsuit can be heard, appeals court rules