Harper had been driving home from the office when something suspicious caught her eye. The disused warehouse could be seen from the road and she drove past it every day, but on this occasion the car parked in the usually empty lot stood out: the distinctive yellow Mercedes belonged to a suspect in a fraud case she was working. Harper had parked out of sight and approached covertly—alone and without back-up. When she got close enough, she overheard a conversation within the warehouse, which she had recorded, despite not having the correct permission to do so. Then, without shouting the standard police warning, Harper had kicked down the door, discovering two men who had just been discussing how much to pay for the huge container of counterfeit cigarettes they were standing in front of. Harper was acutely aware that the growing tobacco black market had links to organised crime and helped to fund terrorism. The people involved in it—the men she had caught—didn’t care that the product was often contaminated with asbestos, rat droppings and mould, or that the smokes were frequently made in overseas factories that used forced child labour. It was easy money; often easier than smuggling drugs, as even if the lorries were stopped, the dogs at the ports weren’t looking for tobacco.

One of the men, the fraud suspect, they’d been tracking for almost a year. The other one was a local businessman, very well connected, with no police record despite several extremely close calls and an intelligence file back at the station nearly an inch thick. The arrest was a huge bonus for the force, more so when they examined the truck and found that several of the cartons right at the centre of the stack didn’t contain cigarettes but raw cocaine—more than ten kilos of the stuff. But. There was no previous evidence trail, no warrant. The conversation, however damning, had been recorded without the go-ahead from any senior officer.

With both men cuffed in the back of her car, Harper had rung Thrupp.

“I need verbal authorisation for a surveillance operation,” she’d said.

“You’ll need to speak to Hetherington. I don’t have the rank for that.”

“I think you might, in extreme circumstances, if a superintendent isn’t available, if authorisation is needed urgently, sir.”

“How urgent is it?”

“How can I put this. It’s kind of … retrospective.”

The bollocking she’d got was immense. At first, he’d outright refused to help her, was prepared to let both the case and Harper’s career suffer the consequences. But eventually she’d talked him round. Hetherington would certainly have given the go-ahead, she’d said, only there hadn’t been time to contact him. There were literally one or two seconds between discovering the crime and her decision to act. The authorisation issue was only a case of delayed admin, if he could just see it that way. If she’d left it any longer, the shipment would have been shipped, they’d have lost the ringleader for another six months, and maybe never have caught the other guy at all.