Like Shetland, Perez thought, sitting in his corner and watching. By now everyone in the islands will know Fran’s dead. There’ll be no hiding from their kindness. The best thing to do would be to move south. He thought with something approaching pleasure of a grey anonymous town, a small tidy room. No clutter, emotional or physical.

Sandy was waiting for Ben to leave, but still he sat there. ‘That wasn’t my finest hour,’ he said. ‘The Braer protest. My mother was so proud of me: I’d stood up for what I believed in. She came to court, took me out for a grand meal when it was all over. Paid the compensation order. But when they arrested me, the police said I’d most likely go to prison. Just give us the names of the locals who helped, they said, and we’ll put in a word with the Fiscal for you. I couldn’t face prison.’

‘So you gave up the names of your friends?’

Ben nodded.

Now at last, he stood to go. This time it was Perez who called him back. ‘I think Angela was glad to be pregnant,’ he said. ‘It was planned. It was you she chose. She wanted your baby.’

At that point Perez decided to leave. Now he knew enough. He couldn’t face watching Sandy question Sarah Fowler. It wasn’t right that the woman was still alive. She must have known her husband was a killer after the first murder, even if she hadn’t realized he’d come to Fair Isle with the intention of stabbing Angela Moore. Perez could understand that Fowler might have nurtured his obsession in secret. He’d dreamed about his revenge for years and planned it in every detail. He’d arranged the crime scene like a theatrical set, each prop with its own meaning. The knife in the back, symbol of betrayal. The slender-billed curlew feather, the one he’d collected in the desert of Uzbekistan, which would be his proof and his ticket to glory, before Angela had stolen the possibility from him.

But once Angela was dead Sarah Fowler must have known. She’d stood beside her husband in church, singing hymns and pretending to pray. Had she convinced herself that her imagination was playing tricks? That John Fowler was a good man? Or was she so wrapped up in her own grief, the loss of her child, that she didn’t care?

Hurrying down the corridor away from the interview room, Perez caught a glimpse of her in the distance. She was wearing a long grey cardigan with a hood, which gave her the appearance of a nun. He supposed she was another victim but at the moment he hated her more than he hated Fowler.

Outside, he was surprised to find that it was still light and that there was pale sunshine reflecting on the water in the harbour.

Chapter Thirty-nine