"In 1976, the U.S. Supreme Court ruled in Gregg v. Georgia that the death penalty was constitutional if it complied with certain specific provisions designed to ensure that it was reserved for the 'worst of the worst'. The same court had rejected the death penalty just four years before in the Furman decision because it found that the penalty had been applied in a capricious and arbitrary manner. The 1976 decision ushered in the 'modern' period of...