I'm big on having a blistering pace. That's one of the hallmarks of what I do, and that's not easy. I never blow up cars and things like that, so it's something else that keeps the suspense flowing. I try not to write a chapter that isn't going to turn on the movie projector in your head.
I did know that the book would end with a mind-boggling trial, but I didn't know exactly how it would turn out. I like a little suspense when I am writing, too.
The rules of suspense are that you do know, and you just don't know when. In the Hitchcock rules of suspense, you are supposed to know that there is a bomb on the bus that might blow up, and then it becomes very tense - but if you don't know that there's a bomb and it just blows up, then it's just a surprise.
I often will write a scene from three different points of view to find out which has the most tension and which way I'm able to conceal the information I'm trying to conceal. And that is, at the end of the day, what writing suspense is all about.