More than three decades after a young couple was found slain in a cold case known as the “Lovers Lane murders,” the man who was finally arrested just last month has died before he could face trial, authorities said. Floyd William Parrott, 64, was taken into custody on March 25 and charged with capital murder in the 1990 deaths of Garland “Andy” Atkinson, 21, and Cheryl Henry, 22, according to the Harris County District Attorney's Office. Parrott was awaiting extradition to Texas for the killings that long haunted Harris County when he was found unresponsive in his Nebraska jail cell on Tuesday, according to Kristy Bauer with the Lancaster County Board of Commissioners. Life-saving measures were performed but Parrott was pronounced dead at the scene. "We ache for Andy’s and Cheryl’s families who were denied their day in court. Our anger for what Parrott took from them is matched only by our determination to keep going,” the District Attorney's Office said in a statement. “Yes, we are still working.…