Donald May looked at enlarged copies of the six letters. Samson had laid them out in chronological order on the conference table. The originals had all been analysed for fingerprints and DNA, but nothing had been found. Each had been hand delivered to Jean Samson’s house. Every one of them contained information about the disappearance of the women that nobody – not even the police – knew.

‘What do you think Don?’

May looked up and across the table at Samson.

‘I think that whoever wrote these letters was either the person who abducted the women, or they were closely connected to them’.

‘What makes you say that sir?’

May stood up, scratched his head, put his hands in his trouser pockets, and walked around the table to where Rigg...

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