The day after Muriel McKay is snatched from her home, the police gather all the physical evidence they can, and tabloid reporters crowd the pavements outside the house, trying to get a piece of the action.

Muriel’s family are desperately trying to make sense of calls by a mysterious man, M3, who claims he has Muriel, and that he’ll return her if the family delivers him a £1 million ransom. It’s only when he sends them a letter, in Muriel’s own handwriting, that they know for sure he’s the most credible suspect.

A Fresh Air and Tell Tale production for BBC Radio 4