With a prime suspect no-one ever expected, detectives race against time to uncover the truth behind his unassuming appearance – and secure the evidence that could prove his guilt.

Presenter: Meic Parry Story Producer: Andrew Dickson Assistant Producer: Katie Hill Executive Producer: Leonie Thomas Production Management: Amy Wheel and Janice Jardine Music: Cerys Hafana Mixing and Sound Design: Mike Woolley Series Producer: Steven Rajam

An Overcoat Media production for BBC Sounds