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An even more dramatic difference surfaced during the murder trial of O.J. Simpson in 1995. The lawyer Alan Dershowitz, who was consulting for the defense, said on television that among men who batter their wives, only one-tenth of one percent go on to murder them. In a letter to Nature, a statistician then pointed out that among men who batter their wives and whose wives are then murdered by someone, more than half are the murderers.
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