Gabi drove them to Frogner Park. They arrived at 11.30. The first buds of spring were showing, colours beginning to emerge among the green grass and leaves. Parking the squad car at the entrance they got out and walked hurriedly through the few tourists and city residents enjoying the brisk spring sunshine.

Earlier, in Pedersen’s office, Sand had tried to explain to his Captain what he thought was happening.

‘It’s something to do with Jules Eckberg,’ Sand explained.

‘Eckberg? Remind me,’ Pedersen asked.

‘A killer I put away twenty years ago. Mutilated and decapitated his boyfriend in Frogner Park. Claimed it was some sort of sacrifice to Satan. The jury convicted him of murder.’

‘I vaguely remember.’ Pedersen nodded.

‘Yesterday that dead cat you sent me to look at. It was killed and displayed in the same way that Eckberg left his boyfriend.’

‘Coincidence?’

‘I thought so but I checked…