I'm unique for a suspense author in that I don't have a specialty background. A lot of suspense writers used to be lawyers or crime beat reporters. I didn't even know a cop when I started out. I finally figured out that I could visit prisons - I just had to be willing to make the phone calls.
Americans have been remarkably devoted to the capacity for belief, to idealism. That's why we get into trouble all the time. We're always viewed as naive.