a statistic that has long been known to criminologists: only a minority of homicides (perhaps as few as 10 percent) are committed as a means to a practical end, such as killing a homeowner during a burglary, a policeman during an arrest, or the victim of a robbery or rape because dead people tell no tales.55 The most common motives for homicide are moralistic: retaliation after an insult, escalation of a domestic quarrel, punishing an unfaithful or deserting romantic partner, and other acts of jealousy, revenge, and self-defense.
