_____ l In murders investigated by the FBI, more than one-third have been committed by one family member against anothet. 2 Three percent of them involve the murder of a child by a parent. 3 Aggression by parents toward children also takes a less drastic form. 4 Each year two million children are kicked, beaten, or punched by their parents. 5 Aggression is evident in marriages as well. 6 Each year, four million husbands and wives violently attack each other. 7 These attacks result in severe injuries in a quarter of a million cases.