At least one law enforcement agency in San Diego is currently using software developed by FaceFirst, a division of nearby Camarillo, California’s Airborne Biometrics Group. It can positively identify anyone, as long as physical data about a person’s facial features is stored somewhere the police can access. Though that pool of potential matches could include millions, the company says that by using the “best available facial recognition algorithms” they can scour that data set in a fraction of a second in order to send authorities all known intelligence about anyone who enters a camera’s field of vision.