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.

My day starts with Radio 4's Today live or 'listen again' wherever I am in the world, thanks to digital radio - I even have an app on my iPhone that receives it.

...I don't have concrete plans for the future. I just think of success and keep a successful attitude. Success is 99 percent preparation. If you set yourself up for winning, rarely will you fail.

We're full of electricity, and the walls and floor of a building contain carbon - the same makeup as a video tape - and I think we give off a huge amount of energy. Some people are able to see that and pick that up. I think almost every person I've met in my life has had some sort of experience that they can't explain, and those fascinate me.

There's a difference between what I call a dumb ghost and a smart ghost. The smart ghost is Hamlet's father - you know, he says, "Get revenge, my son!" That's incredibly rare. It's much more the grey lady in the same place everyday, moving across the floor.

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

The biggest qualification to be a good police officer is to have a high degree of emotional intelligence.