‘We’ve all had a bit of a traumatic few minutes,’ said DCI MacLeod, ‘so let’s just concentrate on the most important task, which is keeping the evidence safe and secure. Download all the relevant files to a memory stick, Dan, then get the laptop bagged up and sent over to the lab. I want it tested for Kent’s DNA, fingerprints, the lot. I don’t want him trying to deny it belongs to him.’

Grier looked surprised. ‘He won’t do that, will he, sir?’

‘He’s denied everything so far. We need to keep building up the case until it doesn’t make a blind bit of difference how good an actor he is, because the jury’ll have no choice but to find him guilty.’

When Grier had gone with the laptop, MacLeod turned to Tina. ‘All right, are you ready to finish this bastard off?’

She nodded firmly. ‘Never readier.’

‘Let’s see how he responds to the fact that we’ve found all his home videos.’ He put a hand on her arm. ‘You had a big part in bringing him in, Tina. When we’re ready, do you want to be the one who charges him?’

But had it all been too easy? Andrew Kent had been delivered to them on a plate with the murder weapon in his bedroom and his laptop full of hugely incriminating video evidence. But even as this nagged at her, Tina pushed it aside, knowing that she was just ignoring the obvious explanation, which was that Kent was like all the other cold-blooded killers who’d begun to believe the hype of their invincibility and had become too complacent.

‘Definitely,’ she said. ‘I want to watch him squirm.’

Six

The job Tyrone Wolfe wanted me to carry out was to buy some guns from an underworld dealer based in Canning Town. Although he’d told Tommy to drive me to the destination, he’d made it clear that I was to go in and make the purchase alone. His rationale was simple: if I bought the guns, I was committing a serious crime and therefore couldn’t be a copper.