He leaves the door open, moving further inside the van, past the body, and there he is. He’s sitting in the furthest corner, his legs pulled up to his chest, his arms wrapped around them. His face is covered in blood, his clothes saturated with it.

Robin crouches down in front of him, his eyes level with his friend’s.

‘Are you hurt, Finn?’

‘I… I don’t know,’ he starts. ‘I don’t feel right, I…’ He stops again. His gaze flicks to the legs under the table, then back to Robin. Robin notices his eyes seem strange – Finn’s eyeballs are constantly twitching side to side and he looks slightly cross-eyed.

‘Why’d you lock the door?’ Robin asks gently.

‘I was scared. I…’ He looks to the dead body again. ‘I don’t understand what’s going on.’

Robin kneels down, knowing that blood will be soaking into the white suit, his presence contaminating the scene. But there’s nothing he can do about that; he needs to get to Finn. He holds his hand out, slowly, as if approaching a nervous dog. Then, when Finn doesn’t recoil, takes his hand in his.

It is cold and covered in blood; his fingernails, some of which are broken, are stained underneath. He wonders what other marks he might have on his body – indicators of a struggle, Dr Sharp fighting back as he was murdered.

Robin can’t think about that now.

‘Finn,’ he asks quietly. ‘Would you like to come with me? To get out of this van?’

Finn looks at him again, his mouth opening and closing redundantly.

‘It’s my fault,’ Finn repeats.

Robin knows what he should be saying now. Cautioning him, following protocol. Procedures every copper knows by heart.

Instead, he puts his finger against his lips.

‘Shush,’ he says quietly. And Finn stops, his eyes still flickering. ‘Finn, listen to me.’ It goes against all of his police training, but this is his best friend. Family. ‘Don’t say another word, you hear me? Don’t say anything else until I say so.’

Finn nods slowly.

‘Now, let’s get out of here.’

Robin stands up again, as much as is possible in the confined space. Holding onto Finn’s hand, he pulls him to his feet. Finn is wobbly and uncertain, standing with his legs wide apart, struggling to get his balance. Robin moves so his arm is supporting his friend’s weight, and he realises just how skinny Finn is. It takes little effort on Robin’s part to support him, and they start moving towards the exit, one shuffling step at a time.

At last, they reach the open door and they both blink in the light. Hands rush forward to meet them, paramedics in green helping Finn down the step and into a carry chair.

Robin watches him go, as Josie and Sophie run to join him. Craig walks up to his side.