
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 U.S., a man desperately calls the police for help after he gets attacked; police work to crack the case using security footage and phone tracking; in the U.K., a dog lover is found murdered in her rural home.

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

A young woman disappears after meeting up with an old flame; in the UK, a dating app-related murder unfolds.

A 9-1-1 call captures the final moments of Collin Turner; CCTV helps reveal Mary Kay Wohlfarth's killer.