Mary de Young had always been interested in deviants and deviance. As a social-psychologist, she studied “behavior that broke the rules,” and whether the worst parts of a person’s behavior were innate, nurtured, or misunderstood. So when news broke in 1983 about a “new” form of child abuse that she had never heard of before, she was — as a researcher — intrigued, and — as a person — horrified. But as she began to investigate the cases, the details didn’t add up.