Hafemeister teaches courses in medical malpractice and health care quality, bioethics and the law, mental health law and psychiatry and criminal law, and has published articles on health, public health, and mental health care policy, as well as range of other issues, including elder abuse, underage drinking and the psychology of jury selection and juror stress. He has written extensively about alternative approaches to medical malpractice in cases of medical error and the effects of pharmaceutical and medical product advertising and marketing on doctor-patient relationships.