Hunter, Stephen, 1946- Bob Lee Swagger novel.

Lance Corporal Thomas McDowell's mother has spent the years since his death in 2003 risking all that she has to find the sniper who pulled the trigger. She comes to Bob Lee Swagger as a last resort. He'll do everything in his power to help her, but what begins as a favor becomes an obsession. Now Swagger is teaming up with the Mossad, the FBI, and local American law enforcement as he tracks a sniper who is his own equal. The ruthless killer seems to be planning an impossible shot-- and Swagger must decipher that assassin's ultimate target before it's too late. -- adapted from jacket and perusal of book