The truth unearthed about Met police officer PC Kashif Mahmood is stranger than an episode of the fictional drama Line of Duty. And it was evidence unearthed in the EncroChat operation which made him plead guilty.

PC Kashif Mahmood had won five awards for his outstanding service as a police officer. But he was secretly working for an OCG in east London.

A detective from the Met police’s anti-corruption unit talks publicly for the first time about the most brazen case of corruption he’s ever seen.

Presenter: Mobeen Azhar Series Producer: Andrew Hosken Editor and Executive Producer: Innes Bowen Catching the Kingpins is a BBC Studios Production for BBC Sounds.