Demara’s impersonations included a ship’s doctor, a civil engineer, a sheriff’s deputy, an assistant prison warden, a doctor of applied psychology, a hospital orderly, a lawyer, a child-care expert, a Benedictine monk, a Trappist monk, an editor, a cancer researcher, and a teacher. One teaching job led to six months in prison.

There are not many facts that have been proven about Demara, only speculation, as there are only a few articles and movies about him that were created during his lifetime. Demara was said to possess a true photographic memory and was widely reputed to have an extraordinary IQ. He was apparently able to memorize necessary techniques from textbooks and worked on two cardinal rules: The burden of proof is on the accuser and When in danger, attack. He described his own motivation as “Rascality, pure rascality”.