I said, ‘Tell you the one time I’ve seen her scared. In the common room, when everyone was losing the head about the ghost. We were so busy with Alison, we paid no attention to Rebecca, but she was terrified. We don’t scare her; doesn’t matter what we throw at her, evidence, witnesses, it won’t shake her. Chris’s ghost does.’

‘So what? You wanna dress up in a sheet and wave your arms at her from behind a tree? Because I swear to God, I’m almost that desperate.’

I said, ‘I just want to talk to her about the ghost. Just talk to her. See where it goes.’

It had hit me while I was on the grass with Joanne’s lot: every girl in that common room had thought Chris was there specially for her. Rebecca had known it.

That made Conway glance my way. She said, ‘Thin ice.’

If the ghost got something out of Rebecca, we were in for a fight, down the line. The defence would scream coercion, intimidation, scream about no appropriate adult present, try to get whatever she said ruled inadmissible. We would argue exigent circumstances: we needed to get Rebecca out of there, that night. Might work, might not.

If we didn’t get something now, we were getting nothing, ever.

I said, ‘I’ll be careful.’

‘OK,’ Conway said. ‘Go for it. Fuck knows I’ve got nothing better.’

I knew the raw-scraped sound in her voice by now. Knew better than to try and soothe it. ‘Thanks,’ I said.

‘Yeah.’

Around the bend in the path, in under the trees – it felt like a drop into nothing, that step into the streaked black – and I smelled smoke. Could’ve been schoolgirl boldness, but I knew.

Mackey, leaning against a tree, all shoulder-slope and crossed ankles. ‘Nice night for it,’ he said.

We braked like kids caught snogging. I went red. Felt him see it through the dark, amused.

‘Good to see you two crazy kids sorted out your problems. I wondered if you might. Been having fun?’

Behind his shoulder, the hyacinth bed. The flowers glowed blue-white like they were lit from inside. Behind that, up the slope, Selena and Rebecca had their heads bent close. Mackey was guarding them.

Conway said, ‘We’d like you to go inside and stay with your daughter. We’ll be with you as soon as we can.’

Cigarette caught between his knuckles, looked like the ember was blooming deep inside his black fist. He said, ‘It’s been a long day. And these girls, in fairness to them, they’re only kids. They’re shattered, stressed out, all the rest. Not trying to teach you two your job – God forbid – but I’m just saying: I wouldn’t put too much stock in anything you get out of them at this point. A jury wouldn’t.’

I said, ‘We don’t suspect Holly of the murder.’