
A team of investigators links CCTV, home surveillance, police body camera, and mobile phone footage that builds the evidence necessary to catch a killer.

A missing 15-year-old is found by cadaver dogs; a dismembered body in a suitcase must be identified.

In Florida, a 13-year-old girl is found stabbed over a hundred times; a teenager with a knife obsession comes under suspicion.

In the United States, a man desperately calls the police for help after he is attacked.

Surveillance footage plays a central role in tracking down the killers in two murder cases.