‘And the video will be in there?’ Freya asks, pointing at it.

‘No, it would transmit the video to a laptop, via Wi-Fi,’ Robin replies.

‘Jonathan’s laptop?’

‘Maybe.’

There’s no way Amy knew about this, Robin thinks. Unless she set it up to video them? He looks at the space where the book was, then at the room. Assuming the lens is wide enough, it would probably capture most of the lounge.

‘Have you found any more?’ Robin asks.

The PCs stop squabbling and shake their heads. ‘We called you as soon as we found this one.’

The four of them start to look again, checking each book on the shelf thoroughly. There’s nothing else there, but when they move into Jonathan’s study, they find one more.

‘We need his laptop,’ Robin says, and they start up again.

But it’s not there. A charger cable lies under his desk, still plugged into the mains, but no computer. Robin swears under his breath.

‘Keep looking,’ he says. ‘We need those video files.’

Hours later, Robin sits in front of his television, empty Chinese takeaway boxes and bottles of beer in front of him, and thinks about the cameras. They left the Miller house pretty much empty-handed. The two cameras, bagged and tagged, now passed to forensics. No laptop. No spare phones, no porn, no dodgy sex toys that would indicate that either Jonathan or Amy had a predilection for such things. They took photos, the house at every angle. They took samples from the drains, from the large chest freezer, from the bath – Robin hoping for something that might show blood or drugs. Anything to indicate foul play. They even took the contents of their bins, ready for someone to filter through.

They couldn’t find any trace of a document relating to life insurance policies on Miller, and Freya confirmed that the warrant to specifically request it had been denied.

‘Baker wouldn’t even put it through to a magistrate,’ she relayed to Robin. ‘“No evidence Amy Miller’s responsible, where’s your reasonable grounds?”’ she said in a passable imitation of Baker’s London accent. ‘“It’s no more than a fishing expedition. You can’t just apply for warrants in the hope you find something”.’

Chicken and egg, Robin thought angrily. Can’t find the evidence without the warrant, and can’t get the warrant without evidence.

Robin hates doing things this way. It’s all wrong. You don’t warn a suspect, then search a house to look for something to tell you what direction to take a murder investigation in. You do a search once you know what you’re looking for. To back up a theory, to find evidence to convict. You don’t wander round a house fruitlessly. Desperately.