Law enforcement officers across the country are preparing to make widespread use of facial recognition equipment to identify people based on a picture of their face or a scan of their iris, or on a fingerprint reader. And concerns have already been raised among the liberty-minded over how the information would be gathered and used.

The Mobile Offender Recognition and Information System (MORIS), produced by B12 Technologies of Plymouth, Massachusetts, runs on the iphone platform. B12 officials report that the company already has contracts with 40 government agencies to deliver 1,000 devices.

The Wall Street Journal details how the device works:

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