The Goodbye Man (Colter Shaw 02) by Jeffery Deaver

Colter Shaw, the itinerant reward-seeker readers met in The Never Game, returns in a new adventure.
Colter takes on a new case when he learns of a reward-two, actually-being offered in Gig Harbor, a small spot in Washington State. Two white teenagers decided to deface a few black churches, and then to set one aflame. But as it turns out, it wasn't empty. And when the preacher and the janitor emerged from the burning building, they were shot-and the suspects drove off.