Winner of four Shamus, five Spur, and three Western Heritage AwardsIn Iroquois Heights, Detroit private eye Amos Walker''s least favorite town, billboards rented by the widow of a man found shot to death in his basement on New Year''s Eve read: "YOU KNOW WHO KILLED ME!" above the number of the sheriff''s tip line. Complicating matters is a $10,000 reward. Hired by the sheriff to run down anonymous tips, Walker follows a trail that leads to a Ukrainian mobster in the Witness Protection Program.