Artificial intelligence Citizens are turning face recognition on unidentified police In part one of an audio series on face recognition, we explore the unexpected ways the technology is being used.

Here's how it works. A face shot is submitted to a facial recognition system, which measures distinctive characteristics such as the width of nose and depth of eye sockets.

Most departmental searches are done via the Northeast Ohio Regional Fusion Center, an interagency intelligence group. The center’s policy on facial recognition, is one of just a few in the area.

Companies and labs have gathered facial images for more than a decade, and the databases are merely one layer to building facial recognition technology.

Microsoft says US Police Departments cannot use Azure's AI-powered facial recognition technology.