
John J. Fitzgerald Jr.
Senior Investigator
Professional Experience
John J. Fitzgerald Jr. is a former, well received Detective Sergeant with the Nassau County Police Department. He was a supervisor in the detective division in various assignments. In addition he was a supervisor in the tactical unit of the department and was a uniform patrol supervisor. Prior to this he was a detective assigned to a precinct detective squad. He is a well-regarded, natural expert on interrogation techniques.
Mr. Fitzgerald was a polygraph instructor at the New York Institute of Security and Polygraph Sciences located in New York City. He is the holder of a New York State private school teaching license, and has lectured on the polygraph at the Nassau County Police Department and Nassau Community College. Mr. Fitzgerald has appeared on television, as an expert discussing polygraph techniques and has traveled world wide doing polygraph testing on hundreds of people.
Education
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