Yngve’s computer pinged. Incoming e-mail. Yngve pushed himself towards it. The victims’ phone records. He had asked Weedon, one of the tech guys at the precinct, to retrieve Mari’s mobile phone from the repair shop downtown. It had been deposited on Saturday, two days before her murder. The screen, according to Weedon, was completely shattered, but he was going to try and retrieve the data. She must have broken it some time after she’d texted Even, Yngve reasoned.

He opened the encrypted files from the phone company. He started to cross-check Johannes’ list against Mari’s, and discovered that no one had called both victims. It was easy, however, to see that Even had been eager to get in touch with his ex-girlfriend over the last few days of her life. Twenty-seven missed calls, from him to her. Yngve also noticed that Frode Lindgren, Mari’s dad, had tried to reach his daughter several times that Saturday, and quite a few times the next day as well. She hadn’t answered, which wasn’t strange, since her phone was broken. But why didn’t Frode know that? Cecilie, Mari’s mother, apparently did.

Yngve identified the numbers of some of Mari’s friends as well. She seemed to be a popular girl.

He went back to the pile of statements again. Martin Dietrichs, a boy in Mari’s class, had said that he had seen her talking to her dad in the show’s interval: It looked as if they were arguing.

Yngve sat up and dialled the kid’s number straightaway. It took Martin Dietrichs a while to answer, but when he did, he immediately turned down the music playing in the background.

‘Oh hey,’ he said as Yngve introduced himself. He made a shushing sound to the others in the room.

‘I’m just following up on what you said in your interview earlier today,’ Yngve started. ‘About Mari’s argument with her father.’

‘Oh yeah,’ Martin Dietrichs said. ‘That. It certainly looked like they were rowing.’

‘Can you describe what happened?’

‘Well, during the interval I saw him walk over to her. She was standing with her back to him, talking to someone, I don’t know who. When he came up to her, she turned away and waited for a second or two, then just walked straight past him. He tried to stop her, but … she just tore herself away from him, if you know what I mean.’

‘So … he grabbed hold of her?’

‘That’s what it looked like to me.’

‘Did you hear what they were talking about?’

‘No, I was too far away for that.’

‘Did you see where Mari went after that?’

‘No, there were too many people around.’

‘What about her dad – did you see where he went?’