On the main street there was a cafe. It must be warm inside because the windows were steamed up and from the pavement he couldn’t see anything at all. He pushed open the door and walked into a small room almost full of women. They had taken over two of the tables and baby buggies were crammed into any spare space. Perez took the one remaining table by the window. The women seemed not to notice him and carried on with their gossip.

A young waitress came to take his order. Perez wiped a patch in the mist on the window so he could see into the street, but it soon steamed up again. He tried to order his thoughts about the Anna Blackwell case but the young mothers’ voices intruded.

‘I feel dreadful,’ one of the women said. ‘I didn’t want to sign that petition to get rid of Miss Blackwell in the first place, but Sarah is chair of governors and she’s always in the school. I thought her reasons for thinking Anna was no good must be real.’

There was a moment of silence. ‘Well, we didn’t know then that Tom and Anna were such . . .’ There was another pause . . . ‘friends.’

‘You can see why Sarah would have wanted her out of the village.’

Perez had always thought there was a lot of gossip in Shetland, but he had rarely heard anything there that was quite as toxic as this. He could understand for the first time why Sarah was so upset that she had called for his help. It must be a nightmare to face this malice wherever she went.

The talking continued. ‘Do we know for certain that Tom and Anna were lovers? Gail, you knew Anna better than anyone. Lucy stayed at your house the night it all happened.’

So this was Gail Kerr, the woman from the farm who’d had Anna’s daughter for the sleepover. She was stocky, a bit older than the others, and she didn’t seem to have a baby with her. She was wearing an anorak over a scruffy sweater. The others seemed to have made more of an effort with their appearances. Some were rather glamorous, shiny and made-up. They could have been in a fancy restaurant instead of a scruffy cafe.

‘Well, my brother Sandy saw them walking together through the woods,’ said Gail, resting her elbows on the table. ‘He said they were so wrapped up in each other that a bomb could have dropped and they wouldn’t have noticed.’

The waitress brought Jimmy’s coffee. It was hardly warm and didn’t taste of anything.

‘But you don’t really think he killed her?’ the first woman said. ‘Not Tom! He’s a doctor. A kind man. He looked after my mother when she had cancer and he couldn’t have been more caring.’

‘It’s just too much of a coincidence.’ It was Gail again. ‘Something weird was going on there. If the Kings didn’t kill her, they drove her to suicide.’