WILMINGTON, Del. (AP) — A Delaware man who was briefly married to former first lady Jill Biden decades ago remains in jail on first-degree murder charges as authorities investigate the death of his wife, who was found unresponsive in their home late last year. William Stevenson, 77, of Wilmington was charged Monday in a grand jury indictment with killing his wife, Linda Stevenson, 64, on Dec. 28. He has remained in jail after failing to post $500,000 bail, authorities said. Investigators have