Polygraph Testing


Calvert County Sheriff’s Office polygraph examiners administer polygraph examinations to suspects, victims, and witnesses involved in criminal investigations. In addition, polygraph examinations are part of the pre-employment background investigation process for police, corrections, and certain civilian public safety positions.

How the Test is Administered

Polygraph examinations are administered to verify the truthfulness of information and to determine the level of participation in or knowledge of a crime. The examination is administered utilizing a computerized polygraph instrument to record physiological data from the human body.

A typical examination will include a pretest interview, a chart collection phase, a data analysis phase, and a post-test interview. The information is analyzed using a computerized scoring system.