Before Plesch would authorize a full-scale liberation operation to rescue Tanja Krebs, she had insisted on corroboration of The Shark’s sighting. ‘It’s not that I doubt your abilities,’ she’d lied. ‘But it’s easy to make a mistake, to see what you want to see rather than what is actually the case. So before we make a big song and dance about this, I want Petra to go out there and confirm that the girl is being held there. If you’re right, we’ll mount a formal surveillance and prepare a hostage release strategy’

She’d never seen Plesch in such a good mood. She’d even agreed without quibble to Petra’s suggestion about putting Marlene into a witness protection programme, and that they should move fast and aim to co-ordinate their raid with Radecki’s arrest in Rotterdam. Even the rats and pigs couldn’t dissipate Petra’s feeling of imminent triumph.

And in spite of Marijke’s pessimism, she couldn’t help but feel they were making some progress on the serial killer front, thanks in part to Tony Hill. He was a strange guy, she thought. There was obviously some kind of history between him and Carol. They both had that slight awkwardness when they talked about each other, and Carol had been much more relaxed since he’d arrived in Berlin. Well, good luck to them. She knew what a difference it made to have a relationship with someone who spoke the same professional language.

She adjusted her position, making sure she could get her binoculars to her eyes with the minimum of movement. She’d been here for hours, and the only thing that had happened was that old man Matic had fed the pigs. She glared at a heavy old sow who was lumbering towards her in a purposeful way, and held her breath.

At least it wasn’t raining.

Yet.

Tony lay on the comfortable bed, enjoying the feel of the cool white cotton on his body. He couldn’t remember the last time he’d felt so genuinely at peace. Certainly never in the middle of a serial killer investigation. But this morning, he felt like a swimmer who has finally arrived at the shore after an interminable battle with the waves. Ever since he’d first met Carol, he’d been struggling to make sense of the feelings she provoked in him. At first, he’d tried denial, since he knew he was incapable of giving her the sexual satisfaction she deserved. Then he’d tried to force it into the box marked ‘friendship’ because he feared the work they’d done together had laid too great a burden of emotional baggage on them. Finally, he’d opted for distance on the basis that what the eye doesn’t see, the heart can’t grieve over.