On 29 December 1969, Alick McKay returned home from work to his house in Wimbledon, southwest London, to discover that his wife, Muriel, was not at home. The lights were on and the contents of her handbag strewn all around the stairs.

Then he received a phone call. "We are Mafia M3. We are from America. We tried to get Rupert Murdoch's wife. We couldn't get her so we took yours instead. You have a million by Wednesday night or we will kill her."

Muriel was never found, her body never recovered.

Now, after more than fifty years, the man guilty of Muriel's murder tells her daughter he will lead her family to where her body was buried.

In this episode of the Sky News Daily, Niall Paterson sits down with our crime correspondent Martin Brunt to discuss the extraordinary bond killer Nizamodeen Hosein has formed with Muriel McKay's family in a final attempt to uncover her remains.

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