Imagine being the victim of a brutal crime, reporting it to police only to be told that the man you’re accusing has no previous convictions.

Then the next day you turn on your TV and see his face, on a documentary about a rapist and killer who became the UK’s longest-serving prisoner.

It sounds like the start of a crime fiction novel, but - unbelievably - it’s all true…

The documentary maker himself, ITV News West Country Correspondent Robert Murphy, tells Daniel Hewitt what you need to know…

You can view Robert's documentary 'Decoy: How young female officers took down the Clifton rapist' on YouTube here: https://www.youtube.com/watch?v=rG-w5KHrzYo