
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.

A horse-loving woman is stalked digitally and in person, but her cry for help is ignored, with lethal consequences; an estranged husband threatens to kill his wife after she helps him out of jail.

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

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