The murder case against Alex Murdaugh, the disgraced South Carolina lawyer accused of killing his wife and son, concluded with a guilty verdict and consecutive life sentences without parole, after a six-week trial that probed the mysteries, manners and machinations of a fallen legal dynasty.After closing arguments were completed, the jury began deliberating Thursday afternoon on whether Mr. Murdaugh, 54, fatally shot his wife, Maggie Murdaugh, 52, and their younger son, Paul Murdaugh, 22, near the dog kennels on the family's rural hunting estate in Islandton, S.C., in June 2021.