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June 17, 2013

State photo-ID databases become troves for police

(Continued)

WASHINGTON —

Facial-recognition technology is part of a new generation of biometric tools that once were the stuff of science fiction but are increasingly used by authorities around the nation and the world. Though not yet as reliable as fingerprints, these technologies can help determine identity through individual variations in irises, skin textures, vein patterns, palm prints and a person's gait while walking.

The Supreme Court's approval this month of DNA collection during arrests coincides with rising use of that technology as well, with suspects in some cases submitting to tests that put their genetic details in official databases, even if they are never convicted of a crime.

Facial-recognition systems are more pervasive and can be deployed remotely, without subjects knowing that their faces have been captured. Today's driver's-license databases, which also include millions of images of people who get non-driver ID cards to open bank accounts or board airplanes, typically were made available for police searches with little public notice.

Thirty-seven states now use facial-recognition technology in their driver's-license registries, a Washington Post review found. At least 26 of those allow state, local or federal law enforcement agencies to search — or request searches — of photo databases in an attempt to learn the identities of people considered relevant to investigations.

"This is a tool to benefit law enforcement, not to violate your privacy rights," said Scott McCallum, head of the facial-recognition unit in Pinellas County, Fla., which has built one of the nation's most advanced systems.

The technology produces investigative leads, not definitive identifications. But research efforts are focused on pushing the software to the point where it can reliably produce the names of people in the time it takes them to walk by a video camera. This already works in controlled, well-lit settings when the database of potential matches is relatively small. Most experts expect those limitations to be surmounted over the next few years.

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