I'm not from DC, and I have never lived there, but my wife and I have good friends there, and we visit often. Nevertheless, siting places for clandestine meetings, udon noodles and murder was a problem.
Faithless Elector was situated primarily in Seattle, which I know well, having lived there for over 20 years. Though I now live in Philadelphia, I have intimate knowledge of the University of Washington campus, the Pike Place Market and the Arboretum. For the first book, I used Google Streetview to refresh my memory of a place, or to calculate distances.
There were six sites I used in and around DC that I found using Streetview. I was able to get to four of them. While visiting them suggested some tweaks and local color I had not contemplated before, I did not have to abandon them. The parking lot in Bethesda, MD, (yes, I know--another parking garage!) is as spooky as I thought/hoped it would be. The 'drops' my conspirators use in Rock Creek and Lansburgh Parks work very well. At no point, fortunately, did I get to a site and think "Oh, no! There's a security camera right there." Even better, I was able to confirm that there was a camera right where I wanted it...which I had first seen on Streeview.
In fact, one area near the DC Armory is better than I had hoped.
I'm in the home stretch for Dark Network. When it's finally out, I will be very interested to hear from DC-area readers about whether the sites I've chosen 'work' for them.
James McCrone is the author of Faithless Elector, a suspense-thriller, Publishers Weekly calls a “fast-moving topical thriller.” Its “surprising twists add up to a highly suspenseful read.” The sequel, Dark Network, is coming soon.