He went back to examining Romy’s phone. Address book, call records, texts, emails; he was running out of options and didn’t have much to show for it so far. All that remained for him to check out was the folder containing image files.

Lots of folks went about snapping anything that moved, subscribed heavily to the selfie craze and had thousands of photos crammed into their phones, but Romy wasn’t one of those people. She had only five files stored in the images folder. They were arranged in chronological order. Ben opened the oldest one first, dating back to January.

The image was a self-taken shot of Romy and a young guy about the same age as her, slightly built, who looked like he might be Moroccan or Algerian. Ben wondered if this was Michel, the boyfriend. They were hugging each other and grinning cheesy grins for the camera on a cloudy beach somewhere, maybe the north coast up near Calais. They were dressed for winter, hats and coats and woolly scarves, and the sea breeze was blowing her hair across her face. She looked happy. The young guy, too. It was a sad picture, in retrospect.

The next photo had been taken three months ago, inside what appeared to be a bar. Ben could see tables covered with glassware and bottles, and red vinyl bench seating and other people in the background. Another image taken not long afterwards the same day showed the two of them posing outside the bar, pulling silly faces. Ben could see the faded lettering painted on the bar window that spelled out backwards the words LE GERONIMO.

Ben laid down Romy’s phone for a moment and tried Michel’s number again on his burner. Still no reply.

He returned to her phone. The fourth photo was a blurry shot of an older couple, taken in the dining room in a middle-class family home a couple of months ago. It looked like someone’s birthday, though the older couple didn’t seem to be having a great time. They both bore a faint resemblance to Romy: her parents, he assumed. Her father had the pasty complexion of a chronic cardiac sufferer and her mother looked like an uptight sort. They were centred at the end of a table bearing a cake festooned with candles, the smiling, goofy faces of some other people peering in at the edges of the frame. Romy wasn’t among them, so Ben assumed she’d been behind the camera. Photography hadn’t been her greatest talent in life, that was for sure.

When he tried to open the fifth and most recent picture file, just three days old, he discovered two things about it. First, that it wasn’t a picture file at all but a much larger video clip. Second, that it was encrypted.