Keeping an eye on the force: life in the real Line of Duty

As the popular BBC drama returns, a former crime reporter takes a look at the reality of fighting police corruption

Last week, an officer from South Wales police received formal notification that they were under investigation regarding their dealings with a man who had been arrested and held overnight in a cell in Cardiff.

The suspect had been released from custody the following morning then found dead shortly afterwards. The investigation is to focus on whether the level of force used by the officer was necessary, proportionate and reasonable" in the circumstances.