"I still want to hear your opinion."

"I don't like to make guesses."

"I know, but you have a certain experience in these matters. I promise I won't hold you to it."

Nyberg rubbed his hand over his unshaven chin. His eyes were bloodshot.

"Maybe 24 hours," he said. "I doubt it's less than that."

They let his words sink in. That means Wednesday night or early Thursday, Wallander thought. Nyberg yawned and left the kitchen.

"You should go home now," Wallander said to Höglund. "We have to be ready to organise the investigation at 8 a.m."

The clock on the wall read 5.15 a.m. She put on her coat and left. Wallander stayed in the kitchen. A pile of bills lay on the window sill. He leafed through them. We have to start somewhere, he thought. Next he went in to Nyberg and asked for a pair of rubber gloves. He returned to the kitchen and looked slowly around. He went through the cupboards and drawers methodically and noted that Svedberg kept his kitchen as neat as his office at work.

He left the kitchen and went into the study. Where was the telescope? He sat down in the desk chair and looked around. Nyberg came by and said they were ready to take Svedberg's body away. Did he want to see it again? Wallander shook his head. The image of Svedberg with half his head blown off was forever fixed in his mind. It was an image that didn't spare a single gruesome detail.

He let his gaze continue to wander around the room. The answerphone was on the desk, as well as a pencil holder, some old tin soldiers, and a pocket calendar. Wallander picked up the latter and leafed through it month by month. On 11 January, at 9.30 a.m., Svedberg had had a dentist's appointment. 7 March was Ylva Brink's birthday. On 18 April Svedberg had written the name "Adamsson". The name was also jotted down on 5 and 12 May. In June and July there were no notes at all.

Svedberg had taken his holiday. Afterwards he complained that he was completely overworked. Wallander kept turning the pages, more slowly now, but there were no more notes. The last days of Svedberg's life were a complete blank. 18 October was Sture Björklund's birthday, and the name Adamsson appeared again on 14 December. That was all. Wallander put the pocket calendar back in its place, and leaned back in the chair, which was very comfortable. He felt tired and thirsty. He closed his eyes, wondering who Adamsson was.

Then he leaned forward and picked up the business cards that were tucked into a corner of the brown desk pad. There was a card from Boman's Second Hand Book Shop in Gothenburg, and the Audi specialist in Malmö. Svedberg had been a loyal customer and had always driven an Audi, the same way that Wallander always traded in his Peugeot for another Peugeot. Wallander put the desk pad back and looked through a packet of letters and postcards. Most of the letters were more than ten years old, and almost all of them were from Svedberg's mother.

He put them back and looked at a couple of the postcards. To his surprise he found one that he had sent from Skagen. The beaches here are amazing, it said. Wallander sat looking at the card for a while.

That had been three years ago. He had taken an extended medical leave, doubting that he would ever return to active duty. He had spent part of that time wandering along Skagen's wintery and abandoned beaches. He didn't remember writing the postcard. His memories from that period in his life were few.

Eventually he had returned to Ystad and started working again. He remembered Svedberg on his first day back at work. Björk had just welcomed Wallander, and the conference room grew quiet. None of them had expected him to return. The person who finally broke the silence was Svedberg. Wallander could still remember exactly what he said.

"Thank God you finally came back, because I really don't think we could've made it another day without you."

Wallander held on to the memory and tried to see Svedberg clearly. He was the quiet type, but someone who could often ease an uncomfortable situation. He was a good policeman, not outstanding in any way, but good. Stubborn and conscientious. He didn't have a lot of imagination and he wasn't a particularly accomplished writer. His reports were often poorly written, and they irritated the prosecutors. But he had been an important part of the team.

Wallander got up and went into Svedberg's bedroom. There was no sign of the telescope. He sat down on the bed and picked up a book off the bedside table. It was called A History of the Sioux Indians and was written in English. Svedberg didn't speak very good English, but perhaps he was better at reading it.

Wallander flipped through the book absentmindedly and found himself staring at a remarkable picture of Sitting Bull. Then he got up and went into the bathroom. He opened a mirrored cabinet and found nothing that surprised him. His own bathroom cabinet was exactly the same.

Now only the living room remained. He would have preferred to skip it, but knew he couldn't. He went into the kitchen and drank a glass of water. It was close to 6 a.m. and he was very tired.

Finally he went out into the living room. Nyberg had put on knee-guards and was crawling around the black leather sofa that stood against a wall. The chair was still overturned and no one had moved the shotgun. The only thing that had been moved was Svedberg's body.

Wallander looked around the room and tried to imagine the events that had taken place. What had happened right before the fatal moment, before the gun went off? But he couldn't see anything. The feeling that he was ignoring something important came over him again. He stood completely still and tried to coax the thought to the surface, but he got nothing.

Nyberg came up to him and they looked at each other.

"Do you understand this?" Wallander asked.

"No," Nyberg answered. "It's strangely like a painting."

Wallander looked closely at him. "What do you mean 'a painting'?"

Nyberg blew his nose and carefully refolded his handkerchief.

"Everything is such a mess," he said. "Chairs have been overturned, drawers pulled out, papers and china thrown all over the place. It's almost as if it's too messy."

Wallander knew what he meant, although he had not yet followed this thought to its conclusion.

"You mean it looks arranged."

"Of course it's only a thought at this point. I don't have anything to back it up with."

"What exactly gave you this feeling?"

Nyberg pointed to a little porcelain rooster that lay on the ground.

"It seems plausible to assume that it came from that shelf over there," he said, and pointed it out to Wallander. "Where else could it have come from? But if it fell because someone was pulling out the drawers and going through them, why would it have landed all the way over here?"

Wallander nodded.

"There's probably a completely rational explanation," Nyberg said. "But if so, you'll have to tell me what it is."

Wallander didn't say anything. He stayed in the living room for a few more minutes, then left the flat. When he came out on the street it was already morning. A police car stood parked outside the building, but there were no onlookers. Wallander assumed that the police officers had been instructed not to give out any information.

He stood completely still and drew a couple of deep breaths. It was going to be a beautiful, late summer's day. Only now was he starting to sense the overwhelming nature of his sorrow, which stemmed as much from genuine affection as from the reminder of his own mortality. Death had come close this time. It was not like when his father had died. This frightened him.

It was 6.25 a.m. on Friday, 9 August. Wallander walked slowly to his car. A cement mixer started up in the distance.

Ten minutes later he walked through the doors of the police station.