He glances back and forth between us, hoping we’ll give him a yes or a no. We don’t.

‘But she seemed very uncomfortable talking about it, and she changed the subject straightaway. It could have been just because we didn’t know each other that well yet, but I wondered if maybe there was more to the story – like if one of them was still alive, but with some problem, like I said. I mean, obviously I wasn’t about to ask, but . . . I wondered.’

This isn’t what Steve’s angling for. ‘Right,’ he says. ‘Interesting; we’ll definitely check it out. Anything else?’

Rory shakes his head. ‘That’s the only thing I can think of.’

‘You’re positive? I’m not joking: any little thing could make a difference. Anything.’

There’s a moment’s silence. Rory catches his breath to say something; then he lets it out again. He isn’t looking at Steve any more.

Steve waits, watching him, easy and interested as a pal in a pub. Rory says, suddenly and unwillingly, ‘I just wish I knew what else you’re not telling me.’

‘Course you do,’ Steve says matter-of-factly. ‘All I can say is, we don’t keep things back just for the laugh. We’re doing it to catch the person who killed Aislinn.’

Rory’s eyes come up, with an effort, to meet Steve’s. He asks, ‘Am I a suspect?’ And he braces himself for the answer.

Steve says, ‘Right now, everyone who had any kind of connection with Aislinn is a potential suspect. I’m not going to insult your intelligence by trying to claim you’re the exception.’

Rory must have known, but it still lights him up with fear. ‘I never even saw her last night. And I cared about her, I thought we were going to – why would I—’

Whatever he was thinking about telling us, it’s gone. ‘Fair enough,’ Steve says reasonably, ‘but we have to figure everyone we talk to is going to say the same thing. And one person’s going to be lying. We’d be only delighted to eliminate you – the faster we narrow it down, the better – but we can’t do it just on your word. You can see that, right?’

‘Then how do you do it?’

‘Evidence. We always need fingerprints, and on this case we’re also asking for coats and gloves – obviously I can’t tell you why, but they should go a long way towards crossing you off our list. You’re all right with that, yeah? We can hang on to those?’ Steve nods at Rory’s gear.

Rory’s taken aback, but Steve hasn’t left him much choice. ‘I guess – I mean . . . yes, OK. I’ll get them back, right?’