Rebecca Coriam, a 24-year-old from Chester, was working on a cruise ship off the Pacific coast of Mexico when she disappeared in 2011. The story of how the police and the cruise line dealt with her disappearance shines a light on the difficulties of getting a thorough investigation when someone goes missing at sea.

Hosts Amber Haque and Dr Julia Shaw discuss this story and find out more about crime on cruise ships.

Producers: Maggie Latham and Rachel Oakes