Undersheriff Estelle Reyes-Guzman gets word that a police officer has been hurt. When she arrives at the scene, it is clear by the scattered objects and marks on the ground that someone had been there after the accident. Who was this stranger and why was he there?

"When a county employee is found shot to death in sun-drenched daylight while sitting in his county road grader, Undersheriff Bill Gastner is faced with puzzling questions. The simplest explanation--that an errant bullet from a careless target shooter's rifle blew out Larry Zipoli's brains--is soon discarded as inconsistencies surface. The fatal bullet shows no rifling marks, and investigation reveals that the shooter walked directly toward the road...