Professing his innocence, Robert Coulson, 33, accused...

Professing his innocence, Robert Coulson, 33, accused of murdering 5 members of his family, including his parents, in a scheme to collect an inheritance was executed this evening. He was pronounced dead at 6:23 p.m. Coulson was condemned for killing on Nov. 13, 1992, his adoptive father and mother, Otis Coulson, 66, and his wife, Mary, 54. Also killed were their daughter, Sarah, 21; Robert Coulson's biological sister, Robin Wentworth, 25; and her husband, Richard, 27.