Texas executed Marvin Wilson, 54, on Tuesday night, less than two hours after the Supreme Court denied his appeal. Wilson's lawyers argued that he was too mentally impaired to face the death penalty, based on a 2004 test that put his IQ at 61, below the generally accepted minimum of 70, and his second-grade reading and math skills. In 2002, the Supreme Court outlawed the execution of mentally retarded prisoners, but left it up to states to determine what constitutes mental impairment. Wilson was convicted of beating and murdering a police informant, Jerry Williams, in 1992.
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