Ming Shuie in a booking photo from November Mary, 36, a former high school math teacher, and her husband, Irv, were Baptist missionaries with two young children, Beth and Steve. In the mind of the man who'd been stalking Mary Stauffer for years, it was the last chance to pounce. The man had been spying on the family intensively. He knew that my parents had been to visit, he had followed me down the highway one time. In fact, he even knew where the spare key to our apartment was.