In this series on the polygraph, I’m reviewing some of the applications and issues of interest to security personnel considering polygraphs as a tool for pre-employment screening and in investigations ...

In my first article in this series on the polygraph, I introduced a bit of history about the “lie detector.” Today I’ll review some of the applications of these devices in the 20th century. A report ...

You’ve seen it on television – investigators on shows like “24” and “Lie to Me” use polygraph testing to determine a suspect’s guilt or innocence. They are able to instantly solve a crime by strapping ...

While the mind can play tricks on itself, the body never lies, according to the Seminole County Sheriff Department’s detector of deception. Sgt. Bill Ripp, in charge of the department’s criminal ...