More In this Friday, May 20, 2016 photo, Tyler Cullen, of Vulcan Security Technologies, looks at video screens in the Hartford police Real-Time Crime and Data Intelligence Center in Hartford, Conn. Staff at the center analyze data from surveillance cameras, gunshot detectors, license plate scanners and other sources.

Vulcan Security Technologies helped set up the center.

AP Photo/Dave Collins HARTFORD, Conn. AP -- Live video feeds from cameras across Hartford, Connecticut, light up a wall of flat-screen monitors in a high-tech room at the city's old police department, while computers take in data from license plate readers and a gunshot detection system.

Real time crime centers have opened in the past year in Hartford; Wilmington, Delaware; and Springfield, Massachusetts.

They also tap into surveillance cameras at schools and businesses — after getting permission in a process agreed upon beforehand — to help police respond to active shooters and other crimes.

Civil liberties advocates also have concerns about airports and how many police departments are now using facial recognition software to track and identify people, saying such software is known for mistakes.

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