Hendricks Polygraph, Inc. 

                      and                      

Confidential Research, Inc. 

Who We Are:


Mr. Kelly B. Hendricks has more than 40-years experience as an investigator and polygraph examiner. In fact, immediately after graduation from college Kelly began his law enforcement career with the Harris County, Texas Sheriff's Office, eventually attaining the rank of detective with assignment to the Homicide Division. In 1982, Kelly completed polygraph school at the University of Houston - Downtown and subsequently opened Hendricks Polygraph, Inc. and Confidential Research, Inc. to serve the polygraph and investigative needs of the regional community. Kelly has since distinguished himself in the polygraph career field, having been appointed by Governor Rick Perry in 2004 as both a member and presiding officer of the Texas Polygraph Board. Kelly has also served as the president of both the Texas Association of Polygraph Examiners as well as the Texas Association of Law Enforcement Polygraph Investigators. Kelly currently serves as the chairman of the Texas Joint Polygraph Committee on Sex Offender Testing. 


With more than 5000 hours of advanced law enforcement & polygraph training, Kelly is recognized by the Texas Commission on Law Enforcement as a Master Peace Officer and has been instrumental in the successful investigation and prosecution of many high-profile criminal cases in the Harris, Montgomery, Brazos, Panola, and Fort Bend County areas.  


Formal Education: 

  • Bachelor of Science, Southwest Texas State University, Law Enforcement ​
Polygraph and Investigative Services







Mr. David S. Williams has served in a law enforcement capacity - both regionally as well as internationally - for over 30-years, the past 16 of which at the senior executive level. With more than 3700 hours of advanced police training in topics such as polygraph, criminal investigation and interview/interrogation, David is formally recognized by the Texas Commission on Law Enforcement as a Master Peace Officer and has been awarded the Commission's Academic Recognition Award. David's law enforcement roles have included career assignments spanning the ranks from police officer, criminal investigator, police supervisor, assistant chief of police, chief of police, to director of public safety.


From 2011-2013, David served with the U.S. Counter Narcotics Program - Afghanistan as the senior counter narcotics adviser to the commander, Training and Education Directorate, Counter Narcotics Police - Afghanistan. In that capacity, David assisted the commander in the development, delivery and management of all police training for Afghanistan's 2900 national counter narcotics agents in the fight against narco-terrorism.  


Formal Education:

  • Bachelor of Science, with honors, University of Houston - Downtown, Criminal Justice Administration
  • Master of Arts, United States Naval Postgraduate School, National Defense and Security