Almost every officer is going to put their life on the line at some point in their career.

There's a really classic cliche every time you switch the TV on - you see cops arguing. I have spent a day a week for many years in the presence of police and I have never seen them argue. It's a military hierarchy. They do what they're told. There's no bickering.

Most good police officers are very open-minded. The bad ones are the ones who are close-minded.

If you go into a bar or restaurant with a cop, the first thing he does is he'll stand in the entrance, and he'll look at every single face in that room because he doesn't want to spend an hour having a drink or lunch and didn't spot some villain they've been looking for, for two years.

Police do get obsessed with solving crimes. You know, particularly if there's been a murder, it becomes personal for the police officer very quickly, and it gets to the family. Even after they've retired, they carry on, not letting go.

A news junkie, I read, daily, the 'Times/Sunday Times,' the 'Guardian/Observer,' 'Mail,' and the 'Argus' - both to keep up with crime in Brighton, where I set my novels, and because I think it is vital to support local papers - they provide a unique accountability for councils, emergency services and so much else, and are dangerously undervalued.

If you and I took a walk down a shopping street in Jo'burg or Cape Town or London, we see two guys looking in a shop window, we think, "Oh, they're wondering what they're going to buy." A cop looks at them and thinks, "Why are they standing there? Are they doing a drug deal? Are they going to mug someone? Are they going to rob the shop?"