If you go into any department store these days, your picture is probably taken 30 times. In London there are 500,000 cameras in public spaces. You have no expectation of privacy in public spaces.

No other agency is scrutinized like the police. Everything we do is in a goldfish bowl. We are not the most popular people in society. We do things like use deadly force; we're the bearers of bad news. We're not firefighters, who are viewed as heroic, helping people, with people loving them back. The police have a much more complex and demanding job.

I liked the military life. They teach you self-sufficiency early on. I always say that I learned most of what I know about leadership in the Marine Corps. Certain basic principles stay with you - sometimes consciously, mostly unconsciously.

Protecting the city is my job, which doesn't translate into hatred. This is war, and in most wars, professional soldiers don't hate the enemy. Hatred can blind you in ways that mar your judgment.

It doesn't take a brain surgeon to figure out that if you stop or curtail stop-and-frisk, or if cops are reluctant to do it, violent crimes are going to go up.

I think one of the biggest scams in law enforcement is the monitor.

You can be stopped if a police officer reasonably suspects a crime is about to be committed, is being committed or has been committed. Every law enforcement agency does it. It's essential to policing.