O’Malley hastily switched on the ignition and put the window down far enough to be able to hear any conversation, though the first sound was just a sharp rapping as April knocked on Issa’s window. O’Malley couldn’t see Issa himself, just April, her hair swinging down over her face as she leaned towards him.

‘Hey,’ she said, her drawl loud and piercing. It seemed that Issa had not opened the window to listen to her. ‘So I know that you’re grieving and all, but you need to leave. Louise has been through enough shit, and this is not reasonable behaviour, OK?’

O’Malley found himself holding his breath slightly. He wasn’t too clear on how Issa was going to respond. He imagined him erupting out of the car and trying to injure her. But there was silence until April said, ‘Hey! You getting this?’

And then the engine started up, and April backed away as Issa drove his car down onto the road. She stood and watched the car disappear from sight, and then she turned and walked towards number eleven.

O’Malley grinned to himself, deciding it was time for that comfort break.

Niall Reakes no longer looked anxious. He looked defeated. He moved slowly and without apparent care into the interview room and sat heavily. There was none of the self-righteousness that had characterised his first interview in this room, and Jonah was caught between satisfaction at his fall from grace and genuine empathy at his situation.

Daniella Hart, here as Niall’s solicitor again, looked rather more cheerful. She threw a slightly combative smile in Jonah and Hanson’s direction as they ran the tape. Jonah smiled back, guessing that Niall hadn’t told his solicitor what he’d really been doing with Dina Weyman.

‘Thank you for coming in again, Mr Reakes,’ Jonah began. ‘I’m afraid we have yet to communicate with your ex-wife.’ He saw Niall’s expression tighten very slightly, but it was almost as though he’d expected this. As though he had come prepared for betrayal. ‘There are, however, a few more questions that need some answers in the interim.’

Niall did nothing more than nod, and Jonah glanced over at Hanson, who was primed to take the questioning from here.

‘We’ve arranged to liaise with the Swiss police in order to trace your movements during Friday afternoon,’ she said, with perfect coldness. ‘Before we pin down exactly where you went in Zurich, and prove what you were picking up, we want to give you the opportunity to cooperate fully with our investigation.’

Niall’s eyes were on the table, his jaw working. Daniella Hart’s eyes were fixed on Jonah now, her pen poised over her notebook. The silence went on for a good few seconds and felt a lot longer.

And then Niall said, ‘Shit.’