‘Leave it with me,’ she said. ‘I reckon as soon as she finds out who I am and what I know about her, she’ll realize she hasn’t got a cat in hell’s chance of making the deranged lover defence work. Can you let me have whatever we’ve got on her?’

‘It’s already on your desk.’ Plesch began to move away.

‘Oh, and Hanna …?’

She paused and glanced over her shoulder. ‘You want something else.’ It was a statement, not a question.

‘Someone else. I need someone out on the street in Mitte. We need to establish that the dead guy really wasn’t Marlene’s man.’

‘Hard to prove a negative.’

‘Maybe so. But if we can nail down who Marlene has been shagging, it might rule out a connection to the dead guy. Likewise, if we can establish whether he was involved with anyone on a long-term basis …’

Plesch shrugged. ‘Probably worth a try. The Shark’s got nothing pressing on his plate. Send him out for some red meat.’

Petra’s heart sank as she walked back to her desk. The Shark was an ironic nickname for the most junior member of the squad. He’d earned it because he had no taste for blood and was incapable of moving backwards to reassess new data in the light of experience. Nobody thought he would last long on the squad. He wasn’t the person she would have chosen to trawl the bars and cafés of Mitte, probing their sources to find out what was to be learned about Marlene Krebs. It showed what a waste of time Plesch thought that was. Still, it was better than nothing. And she could always head out there herself that evening if she’d not managed to pry something useful out of Krebs in exchange for a deal on her sentence.

It wasn’t as if she had anything better to do.

Even though it was a raw, damp day, Carol was sweating. She’d carried out the first part of her assignment without a hitch, but she knew she was a long way off being home and dry. The detailed brief had arrived by courier just after seven. She’d ripped open the thin envelope, almost tearing the contents in her haste. There was a single sheet of paper inside. It informed her that she should be at the address she had previously been given by ten a.m. There, she would be provided with the rest of her instructions.