For decades, Mazher Mahmood exposed various personalities in the News of the World whilst posing as a fake sheikh. But after the collapse of the drugs trial of pop star Tulisa Contostavlos, a judge accused Mahmood of lying.

Now, Panorama's John Sweeney speaks to some of his highest profile targets and the men who helped him expose them. They allege that the Fake Sheikh was the real crook, using sophisticated entrapment and even creating crimes and fabricating evidence. (12/11/2014)

The reporter's elaborate set-ups led to the exposure of dozens of people, from hapless royals to hardened criminals while he worked for the now defunct News of the World.. He is pictured while posing as a Sheikh in the 1990s