Are police doing enough to tackle corruption in their ranks? Following a number of high profile trials in which officers have been jailed, Allan Urry investigates the crimes they committed and asks if more could have been done to stop them. A constable given a life sentence earlier this month for a series of sex attacks on vulnerable women he met while on duty, had previously been put on trial for rape, during his time in the army. Why didn't the police service know this when they agreed to employ him?