TV series finale coincides with true crime book launch about notoriously corrupt DS Derek Ridgewell
As Line of Duty completes its successful and possibly final series, just how close to reality was it?
As it happens, the end of the run coincides with the publication of Rot at the Core, an in-depth investigation into the life and times of one of Britain’s most spectacularly corrupt police officers, whose career ended in disgrace before his death in a prison cell.
