Bob Nygaard is an American private investigator and member of the National Association of Bunco Investigators; he specializes in the investigation of psychic fraud. He has been instrumental in the arrest and conviction of numerous "psychics", helping their victims obtain justice including financial restitution amounting to millions of dollars. He has consulted for ABC News and 20/20 as a specialist in psychic fraud. Nygaard previously was a member of the New York City Transit Police and Nassau County Police Department, retiring from service in 2008.
In August 2018, Nygaard appeared as himself in episode "The Psychic Didn't See Him Coming" of the CBS true-crime show Pink Collar Crimes, which portrays his investigations of the crimes committed by self-proclaimed psychic and convicted fraudster Gina Marie Marks.Nygaard is sympathetic to psychic fraud victims who, he says, law enforcement authorities often fail to take seriously. He is also an outspoken critic of the inconsistent prosecution of this type of crime across the United States, and advocates for prison terms for convicted psychics, rather than merely forced restitution to their victims.