“Why do they make military trousers like that for children?” he asked.

The three of them stood hunched over the boy’s body. The blue flashing lights of the police cars bounced off the surrounding houses and blocks of flats. A few passers-by had gathered by the cars. The first reporters had arrived. Forensics were photographing the scene, their flashes vying with the blue lights. They sketched the layout of the area where the boy was lying and the immediate surroundings. The forensic investigation was in its initial stages.

“Those trousers are in fashion,” Elinborg said.

“Do you think there’s something wrong with that?” Sigurdur Oli asked. “Kids wearing trousers like those?”

“I don’t know,” Erlendur said. “Yes, I find it odd,” he added after a pause.

He looked up at the block of flats. People were outside on the balconies watching, in spite of the cold. Others stayed indoors and made do with the view through the window. But most were still at work and their windows were dark. The officers would have to go to all the apartments and talk to the residents. The witness who had found the boy said that he lived there. Perhaps he had been alone and had fallen off the balcony, in which case this could be recorded as a nonsensical accident. Erlendur preferred that theory to the idea of the boy having been murdered. He could not pursue that thought through to the end.

He scrutinised the surroundings. The garden behind the flats did not seem well kept. In the middle was a patch of gravel that served as a little playground. There were two swings, one broken so that the seat hung down to ground level and spun around in the wind; a battered slide that had originally been painted red but was now patchy and rusty, and a simple see-saw with two little seats made from bits of wood, one end frozen solid to the ground and the other standing up in the air like the barrel of a large gun.