A war hero is beaten to death for no apparent reason. The crime scene offers few clues, but Lt. Joe Kenda notices an unusual pattern in the victim’s head wounds and asks engineers to identify the murder weapon and crack the case.A war hero is beaten to death for no apparent reason. The crime scene offers few clues, but Lt. Joe Kenda notices an unusual pattern in the victim’s head wounds and asks engineers to identify the murder weapon and crack the case.