HUNTSVILLE - After trying to console his mother, convicted killer Marcus Cotton was executed Wednesday evening for the fatal shooting of a Houston-area assistant district attorney during a robbery attempt 7 1/2 years ago. "Well, Mom, sometimes it works out like this," Cotton said from the death chamber gurney as his mother, who was among the witnesses, watched through a window. "When you are dealing with reality, real is not always what you want it to be." Cotton, 29, a native of the Houston suburb of Missouri City, told his relatives to take care of themselves and that he loved...