Closed-circuit television

Super Recogniser Police Squad Hunt Skripal Nerve Agent Attackers

Detectives trained to memorise faces are trawling CCTV footage.
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CCTV Footage Of Murdered Schoolgirl Lucy McHugh To Be Shown To Football Fans

Lucy's body was found near Southampton Sports Centre on July 26.
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The Huge Counter-Terror Operation After The Salisbury Spy Attack - In Numbers

Officers have scoured more than 4,000 hours of CCTV footage.
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China's Facial Recognition Cameras Successfully Spotted A Suspect In A Huge Crowd

China has a network of over 170 million cameras.
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CCTV Shows Moment Fireball Tore Through Parsons Green Tube

The 18-year-old is on trial for attempted murder.
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