Peter Ratliff and Tom Williams prosecuted PC Kashif Mahmood and 5 others in what the police watchdog described as one of the worst cases of police corruption. Mahmood worked for an organised crime group, unlawfully seizing cash from rival couriers and misusing police computers. He was jailed for 8 years, with co-conspirators receiving sentences of between 5 and 16 years’ imprisonment. Read more here.