When a county employee is found shot to death in broad 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. The fatal bullet shows no rifling marks, and investigation reveals that the shooter walked directly toward the road grader, in full view of the victim...