The four sectors that use the polygraph include law enforcement agencies, the legal community, government agencies, and the private sector.

Here are a few general Polygraph test questions

The term "polygraph" literally means "many writings." The name refers to the manner in which selected physiological activities are simultaneously recorded.

Written by the “founding father of polygraph in our family,” Earl James used decades of experience in interviewing, polygraph science, investigations, and collegiate level instruction to the author, “Catching Serial Killers.” May his contributions to the field of Polygraph Science and Homicide Investigation live on forever.