Dr. Richard Illes, a successful heart surgeon, and his wife, Miriam, a homemaker and mother to their young son, were a prominent couple in their small community of Williamsport, Pa. Then, on Jan. 15, 1999, Miriam, who seemingly had no enemies, was shot as she stood in front of her kitchen window - a bullet went straight through her heart. Who wanted the surgeon's wife dead? Correspondent Susan Spencer reports.