
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 and the UK, a trail of video footage is integral in solving two shocking murder cases.

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

A spree killer is on the loose in New Mexico; in Colorado, a mother is found dead inside an isolated cabin.

In the United States, a five-year-old boy is found dead after going on a trip to Disneyland with his father; in the United Kingdom, a parking dispute escalates into a double murder.