‘Poor bastard,’ says Roche from his corner, which reeks of aftershave and sticky keyboard. Roche is a big no-necker who went into this gig because the only way he can get a stiffy is by bullying people into tears, but he’s no fool: he knows exactly when to keep that instinct chained up and when to let it out for a run, and he gets results. ‘Will I tell him to go ahead and cut off his own balls, save himself some time and hassle?’

‘It’s not my fault my solve rate’s higher than yours, Roche,’ I tell him. ‘It’s because you’re a retard. Learn to live with it.’

The floaters look startled and try to hide it. Roche shoots me a bull-stare that I don’t bother noticing. ‘What’s the story on Fallon?’ I ask, dumping my satchel on my chair.

‘Twenty-nine, owns a bookshop in Ranelagh,’ says the fat guy. ‘Lives above the shop.’

‘With anyone?’

‘Nah. On his ownio.’

Which is a pisser: a flatmate would have been not only a nice witness to have, but also an obvious candidate for the guy who called it in. Steve asks, ‘Anything happen that we should know about, while you were sitting on his house?’

They look at each other, shake their heads. ‘Not a lot,’ says the gym rat. ‘He opened the front curtains around ten, in his pyjamas. No other visible movement. By the time we picked him up, he’d got dressed, but no shoes, so it didn’t look like he was planning on heading out.’

‘He’d had breakfast,’ says the fat guy. ‘Coffee and a fry-up, by the smell.’

Steve catches my eye. A guy punches his girlfriend to death, goes home and snuggles into his pyjamas for a nice bit of kip, gets up in the morning and stuffs his face with egg and sausage. It could happen; Fallon could have been dazed into autopilot, or a psychopath, or setting up his defence. Or.

The room is hot, a dry edgy heat that pricks at the skin on my neck. I pull my coat off. ‘What’d you say to him?’

‘Like you told us,’ the fat one says. ‘Nothing. Just said we thought he might have some information that would help us out with an investigation, and asked him if he’d mind coming in for a chat.’

‘And he just said yeah? No hassle, no questions?’

The two of them shake their heads. ‘Accommodating guy,’ says the gym rat.

‘No shit,’ I say. Most people, if you ask them to come in to a cop shop and answer some questions, they want at least a little info before they ditch the day’s plans and toddle along after you. Either Rory Fallon is a natural pushover, or he really, really wants to look like a helpful guy with nothing to hide.

‘Did he say anything along the way?’ Steve asks.