He hadn’t made coffee. The percolator in the kitchen had apparently not been used in the past few hours. There were no signs of tea having been drunk, no cups taken out of the cupboards. Glasses stood untouched where they belonged. The murdered man had been the orderly type. Everything neat and tidy. Perhaps he did not know his assailant well. Perhaps the visitor had attacked him without any preamble, the moment the door opened. Without taking off his shoes.

Can you murder someone in your socks?

Erlendur looked all around and told himself that he really must organise his thoughts better.

In any case, the visitor had been in a hurry. He hadn’t bothered to close the door behind him. The attack itself showed signs of haste, as if it had come out of the blue and without warning. There were no signs of a scuffle in the flat. The man had apparently fallen straight to the floor, struck the coffee table and overturned it. On first impression everything else seemed untouched. Erlendur could see no sign that the flat had been robbed. All the cupboards were firmly closed, the drawers too, a fairly new computer and an old stereo where they belonged, the man’s jacket on a peg by the front doorway still contained his wallet, in it one 2,000-crown note and two payment cards, one debit and the other credit.

It was as if the attacker had grabbed the first thing at hand and hit the man on the head. The ashtray was made of thick, green glass and weighed at least a kilo and a half, Erlendur thought. A murder weapon there for the taking. The assailant would hardly have brought it with him and left it behind on the sitting-room floor, covered in blood.

These were the obvious clues: The man had opened the door and invited his visitor in or at least walked with him into the sitting room. Probably he knew his visitor, but not necessarily. He was attacked with an ashtray, one hard blow and the assailant quickly made his getaway, leaving the front door open. As simple as that.