His profile used the ‘friends’ privacy setting, which meant anyone could see he had 137 friends, their names, and in some cases where they worked. He liked Smokey, Gasoline and Queen and, hardly surprisingly, Lasse Stefanz, Wisex and Robert Wells as well.

He must be into genealogy, too, since he’d liked pages such as The Federation of Swedish Genealogical Societies, Friends of Roots and the County Council Archive. Sportswise, he favoured body-building, though he also seemed to have his sights set on doing Iron Man in Kalmar at the end of the summer.

What he couldn’t find, however, was a home address, nor any pictures, apart from the obnoxious profile picture. In order to access those things, he would have to get Lennart to accept a friendship request.

He couldn’t see his colleague Lillemor Ridell among Lennart’s friends, so he immediately set to work creating a profile for her, even though she probably already had one. A cropped picture from the ICA Maxi website would have to do for her profile picture. Five minutes later, he’d fired off a friendship request.

He only just had time to pull on underwear, a T-shirt and socks before Lennart accepted.

Shift doesn’t start until noon tomorrow so plenty of time for an hour of rowing, a leg session and twenty minutes of sun! #beach201 #onlyasoldasyoufeel #ironmankalmar

Lennart’s latest status update was only a few minutes old and accompanied by a bare-chested brag selfie taken in front of the bathroom mirror.

It was all he needed.

Who and when were set in stone. All that remained for the dice to decide was how.

The initial roll was to determine which category to settle first. Odd numbers represented murder weapons and even numbers ways of dying.

A three.

He pulled out his list of weapons numbered from one to twelve and did a pre-roll to decide whether to use one or two dice.

1. Pistol
2. Rope
3. Crossbow
4. My body
5. Spear
6. Knife
7. Slingshot
8. Sword
9. Rifle
10. Item from crime scene
11. Machine of some kind
12. Baseball bat

A four.

That meant he had to use two dice, so he took out another and shook both in his cupped hands before releasing them on to the green felt.

Two fives.

In other words, he was going to use something from the crime scene. It could be anything at all, so long as he hadn’t brought it with him. In many cases, that and number eleven might be the most challenging options. But this time, it was definitely the best. Particularly given that he had less than twelve hours to prepare.

All he needed now was a final confirmation. One last roll of the twenty-sided marble dice to set his plan in motion.

All sides except the one marked with an X meant he could get started. He quickly picked up the dice, shook it and rolled.

An X.