He was a large man, Detective Sergeant Martin Anderson. Mid-thirties, a slight paunch, small blue-grey eyes that regarded her from the depths of a ruddy face. A proper grown-up, with a proper grown-up job: even though he was less than a decade older than Clara and Mac, he might as well have belonged to an entirely different generation. She clocked his wedding ring and pictured a couple of kids at home who idolized him. A very different sort of life to the ones led by her and Mac and their friends, with their media jobs, their parties and endless hangovers. He was accompanied by DC Mansfield, who nodded at her and flashed her brief, impassive smile.

‘This is Mac, Luke’s best friend,’ Clara explained nervously as the four of them sat down in the living room. The flat felt very crowded suddenly; a dark cloak of authority and gravity descending upon her home that gave her worst fears credence and made fresh anxiety twist in her belly. Outside on the street someone gave a long, low whistle, a car engine stuttered into life; the world continued as usual, oblivious to the tense, waiting silence of this room.

‘I’ve been passed on the information you gave DC Mansfield yesterday,’ Anderson began in a voice that was deep and measured, a faint accent curling around its vowels that Clara’s London ears identified vaguely as Midlands.

‘I take it you’ve had no contact from Luke since then?’

Clara shook her head. ‘No.’

He nodded. ‘In most cases the missing person turns up within forty-eight hours. But due to the harassment Luke’s been receiving, we need to make sure there’s nothing more to this. I understand there’d been a letter … some photographs as well as the break-in a few months ago? Do you have them here with you?’

For the next ten minutes Clara went about the flat, gathering the various items that DS Anderson requested – Luke’s bank details, the names and numbers of his friends and family and place of work, a recent photograph, his passport and so on. She moved as if in a dream, stepping around DC Mansfield, who glanced at her apologetically as she conducted her own search, opening various cupboards and drawers. ‘What are you looking for?’ Clara asked when she found her scrutinizing the bathroom cabinet.

‘It’s standard procedure,’ she said, not answering her question. ‘I’m going to need something with Luke’s DNA, by the way. Did he take his toothbrush with him?’

Clara shook her head. ‘He didn’t take anything with him.’ She handed over Luke’s green toothbrush, leaving her own red one alone in its cup, and tried to fight the tears that sprung to her eyes.