MELVIN TURNER -Turner, 45, was convicted of robbing and shooting to death 35-year-old surgeon George S. Hill Jr. and 44-year-old schoolteacher Jo Ella Champion in an airport hangar in July 1979. In 1986 the court reversed the death-penalty conviction, saying that all three prospective black jurors had been improperly removed from the jury trying the case, a "patent violation" of a defendant's right to a trial by a jury of his peers. Turner, who scored 79 on an IQ test, was retried and again convicted of the murders and sentenced to death. His accomplice, Teague Hampton Scott, was convicted of first-degree murder and sentenced to 52 years.