
Each case is pieced together like a jigsaw as a team of investigators links CCTV, home surveillance, police body camera, and mobile phone footage that builds the evidence necessary to catch a killer.

In the US, a mysterious man buying yogurt is linked to a missing woman; his arrest leads to the discovery of four other women who have disappeared; a young student gets into a taxi after a night out and never makes it home.

A double murder case ends in a confession; CCTV exposes a jealous former partner.

The murder of a couple is caught on camera; in the UK, a long-standing feud turns fatal.

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