Under the guise of treating chronic pain, a doctor in Stafford, Va., ran a “pill mill” that led to a patient’s fatal overdose, according to an indictment in federal court in Alexandria. Hundreds of patients of Nibedita Mohanty, former chief of medicine at Stafford Hospital, were given excessive prescriptions for addictive medications despite warnings that the drugs were being abused, distributed and resold, a grand jury concluded.