Bob Nygaard is an American private investigator (PI) specializing in the investigation of confidence crimes, most notably 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.