A Missouri man whose death sentence was overturned three times before being reinstated is now scheduled to die in May for killing a small-town couple nearly 26 years ago. The Missouri Supreme Court on Monday set a May 3 execution date for Carman Deck. Executions in Missouri are carried out at the prison in Bonne Terre. James and Zelma Long were fatally shot during a robbery inside their home in De Soto, about 45 miles southwest of St. Louis, in July 1996. Deck confessed to the killings and was sentenced to death in 1998. The Missouri Supreme Court threw out the sentence due to errors by Deck’s trial lawyer. After he was sentenced a second time, the U.S. Supreme Court tossed that sentence in 2005, citing the prejudice caused by Deck being shackled in front of the sentencing jury. He was sentenced to death for a third time in 2008. …