New Tracking Frontier: Your License Plates

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http://online.wsj.com/article/SB10000872396390443995604578004723603576296.html

New Tracking Frontier: Your License Plates
By JULIA ANGWIN and JENNIFER VALENTINO-DEVRIES

For more than two years, the police in San Leandro, Calif., photographed Mike Katz-Lacabe's Toyota Tercel almost weekly. They have shots of it cruising along Estudillo Avenue near the library, parked at his friend's house and near a coffee shop he likes. In one case, they snapped a photo of him and his two daughters getting out of a car in his driveway.

Mr. Katz-Lacabe isn't charged with, or suspected of, any crime. Local police are tracking his vehicle automatically, using cameras mounted on a patrol car that record every nearby vehicle—license plate, time and location.

"Why are they keeping all this data?" says Mr. Katz-Lacabe, who obtained the photos of his car through a public-records request. "I've done nothing wrong."

Until recently it was far too expensive for police to track the locations of innocent people such as Mr. Katz-Lacabe. But as surveillance technologies decline in cost and grow in sophistication, police are rapidly adopting them. Private companies are joining, too. At least two start-up companies, both founded by "repo men"—specialists in repossessing cars or property from deadbeats—are currently deploying camera-equipped cars nationwide to photograph people's license plates, hoping to profit from the data they collect. ...


A license-plate-reading camera