This is the case that refuses to die. Forty-two years ago, the wife and daughters of a handsome young Green Beret doctor, Jeffrey MacDonald, were stabbed and bludgeoned to death at the family home in military housing at Ft. Bragg, N.C. MacDonald, now 68, is serving three life sentences for the crime, which spawned a bestselling book, "Fatal Vision," a hit TV miniseries and decades of speculation over whether MacDonald is a sadistic killer or a victim of injustice. In federal court Monday in Wilmington, N.C., the case will play out once again with all its lurid details — drug-crazed...