At the request of a prosecutor, a Massachusetts Supreme Court justice delayed for at least 24 hours the imposition of a three-month jail term for a television reporter who refused to name the source of a news story. Boston Dist. Atty. Newman Flanagan said he sought the stay because of “sensitive negotiations” his office was conducting in efforts to identify the man who told WCVB-TV reporter Susan Wornick that he saw police looting a drug store in Revere. Wornick, 34, was found in criminal contempt Tuesday.