More than three decades after he was arrested for his crimes, it's been revealed that Jeffrey Dahmer's mom bizarrely claimed that the cannibal serial killer "didn't hurt" his victims. "He killed them, but he never tried to hurt them," Joyce Dahmer previously told Dr. Eric Hickey, a criminal psychologist who has spent decades studying serial offenders. Hickey spoke to Joyce about Dahmer's crimes amid his new investigation into Christopher Wilder.