In Albany, New York, a camera catches a murder and a real-time crime centre helps bring the killer to justice; in Fort Worth, Texas, police use surveillance cameras to track down a gunman and stop a one-man crime wave.

In New Mexico, a shooter guns down an unarmed man, and a Real Time Crime Centre helps find, chase and capture the culprit; in Florida, an armed man robs one store after another, but police close in on him from the ground and air.

In Louisiana, when a murder turns up on tape, the police use surveillance video and social media to track down the killer.

Police in Charleston, South Carolina, use a camera network to catch a killer who gunned down a man in front of his girlfriend; in Utah, when a man snaps and turns on his own family, police use drones to hunt him down before there's another victim.

When a man is shot and killed on camera outside an Atlanta area hotel, police use licence plate readers to solve the mystery; two men in Texas go on a robbery spree, and investigators use a tiny detail to track them down.

Investigators analyse surveillance video to solve the shooting death of a man outside a friend's home and uncover a secret behind the killing; when a woman turns up murdered in her own home, police use the RTCC to track a killer close to home.