Mr. Donald L. Clark

A Polygraph Expert In Cincinnati, OH

As a highly experienced and respected forensic polygraph examiner, Mr. Clark can help you get to the bottom of your case. 

As a graduate of Texas A&M University Polygraph Examiners School, Mr. Clark has over 40 years of experience and has conducted over 14,000 polygraph examinations throughout his professional career. 


Only the latest technology and state-of-the-art Axciton computerized polygraph is used for all examinations at Clark-Dye & Associates.  This can often include sound and video.

Following the reading of the charts, all examinations are validated a second and a third time by using objective and probabilities scoring.  This combines to achieve highly accurate results. 

Education & Certification

Mr. Clark participates in polygraph educational seminars as a forensic polygraph examiner.  He does this in addition to his professional association of Polygraph Examiners activities in and around the Ohio area. 


State of Ohio Certified Polygraph Examiner

  • Clinical Sex Offender's Treatment & Monitoring Programs, certified by APA


  • American Polygraph Association
  • National Polygraph Association
  • American Association of Police Polygraphs
  • Ohio Association of Polygraph Examiners