St. Louis Missouri region (636) 391-2188
Chicago Illinois region (312) 229-0074

Professional Polygraph Examinations

PDD - Psychophysiological Detection of Deception


 We can help you seek the truth! 





We Use State-Of-The-Art Computerized Polygraph Equipment

Important Information: In addition to conducting professional polygraph examinations, we are a licensed, full-service, fully staffed, investigative agency.  Our polygraph examiners are experienced investigators - most have extensive law enforcement experience.

Our trained and certified polygraph examiners conduct the polygraph examinations.  During the truth verification process, computerized polygraph instrumentation is utilized, in conjunction with pre-test and post-test interviews.

The term "polygraph" means "many writings", and various physiological activities are recorded.  The polygraph instrument records changes in cardiovascular, respiratory and electrodermal patterns.  The polygraph recordings are reviewed and analyzed by the examiner, and a professional opinion is rendered based on the polygraph recordings.

Links below provide additional information:



Polygraph exams that are employment related are done in compliance with the Federal Employee Polygraph Protection Act of 1988 (EPPA)


 Polygraph Memberships / Affiations


  • American Polygraph Association (APA)
  • American Association of Police Polygraphists (AAPP)
  • British & European Polygraph Association (BEPA) 
  • National Polygraph Association
  • Missouri Polygraph Association
  • Kansas Polygraph Association
  • Florida Polygraph Association