The unsolved murder of Daniel Morgan and claims of police corruption in the case.
Investigating the barrister and author Constance Briscoe, jailed for lying to the police.
Converts to Islam tell reporter Zubeida Malik how they were lured into extremism.
Simon Cox investigates allegations of abuse of power and a culture of silence.
Was David Cameron right to order an investigation into the Islamist organisation?
The MPs' expenses row has claimed another victim, five years after the initial revelations
Tom Esslemont demystifies the debate surrounding the cholesterol-lowering drugs.
How can a plane disappear, and why are we no nearer to solving the enigma of flight MH370?
A Danish zoo caused outrage when it killed a giraffe. Do UK zoos do similar culls?
Is Amanda Knox really guilty of the murder of British student Meredith Kercher?