Professional Polygraph Examinations in Oklahoma

Polygraph exams are often requested by individuals, businesses, and corporations. Polygraph testing is a very important investigative tool in both criminal and civil cases. A Professional polygraph exam can help determine whether or not a person is telling the truth.

NOTE: Oklahoma is one of 28 Licensing States for Polygraph Examiners. The Oklahoma Board of Polygraph Examiners is a 5-person panel who Licenses and governs all Examiners within the State. This Board is under the jurisdiction of the State of Oklahoma Attorney General’s Office.

Here are some tips clients should consider when selecting a polygraph service. When researching polygraph examiners, be sure to select one that is fully licensed, bonded, and insured. Also, establish that the agency/examiner will keep all information acquired from the polygraph exam strictly confidential. Only clients are supposed to be privy to the information obtained as a result of the polygraph exam.


Equipment: Polygraph testing equipment can be either analog or computerized (digital). Both systems allow the examiner to view the results while conducting the examination. The advantage of the computerized system is that the software can analyze the subject's responses in real time, thus rendering the process less subjective. The examiner should use the latest, state-of-the-art lie detection testing equipment to conduct the polygraph exams. When you select an agency to provide polygraph tests, you are relying upon them for the accuracy and validity of the results. Regardless of which system is used, the Examiner is ultimately responsible for verifying the accuracy of the examination.


Our agency utilizes the Lafayette LX4000 Computerized Polygraph System. This system records, stores, and analyzes physiological changes during the examination and is capable of monitoring / recording 7 (seven) channels of data at one time.

Training / Credentials: Professionals who administer the exams and analyze the results are supposed to be highly trained and licensed. Roy Clugston is a graduate of the Backster School of Lie Detection, is Certified through APA (American Polygraph Association), and is Licensed in the State of Oklahoma.


Why Request a Polygraph Exam? There are a variety of reasons that lead businesses and individuals to seek professional polygraph services. The reasons may be civil or criminal in nature. Attorneys, insurance companies, law enforcement agencies parole officers, organizations and even private individuals often utilize polygraph examinations.

Some reasons why individuals may request polygraph exam services include: evidence in civil litigation cases, suspected marital infidelity, family issues, relationship issues, cases of divorce, custody cases, youth and teen alcohol or drug use, and pre-marital screening. Should their children become involved in drug or alcohol use / abuse, the first step in helping them curb these unhealthy and unsafe practices is acknowledging the problem. Polygraph exams may prove helpful in achieving this goal.

Some reasons why businesses and professionals may request polygraph exam services include: criminal investigations, pre-employment screening, theft and/or embezzlement of company property/funds, and industrial espionage. The prevention of commercial sabotage, misappropriation of funds, embezzlement and other breaches in your company's security can be enhanced by taking care of these cases quickly through the use of professional polygraph testing services.

A polygraph examination or lie detector test measures changes in physical signs that are caused when a person answers a direct question untruthfully. Certified polygraph examiners conduct tests to determine the truthfulness of answers given to questions regarding drug use, marital fidelity, criminal activity and a variety of other subjects. The Employee Polygraph Protection Act of 1988 allows examinations to be used as a pre-employment screening tool in some occupations.

Law firms may frequently request a polygraph exam in order to validate a client's claims during the initial stages of an investigation. Attorneys may also request polygraph exams to determine the truth in a case, assist in assessing the truthfulness of witness' statements, and/or verify claims with respect to a plea negotiation. Accurate results from polygraph exams can provide an attorney with pertinent information necessary to defend a client and may help resolve cases more quickly. Polygraph exam results are protected under attorney-client privileges.

Private Investigation agencies that administer polygraph tests are expected to maintain the highest level of professionalism and integrity at all times. Clients will recognize and accept that a polygraph testing agency is respectable and well-established when the agency can provide proof of experience, integrity, and a good reputation.

Law enforcement agencies sometimes find it helpful to validate claims of witnesses using a polygraph exam. Testing people who are prime suspects in any kind of criminal activity can be very beneficial to the investigation. Likewise, parole agents and probation officers find lie detector testing crucial for managing convicted persons who have been released from prison on parole or on probation.

If you need assistance to uncover the truth about a situation that you find yourself in, a professional polygraph testing agency may be your best option.

Are the results of polygraph exams admissible in court? Courts accept lie detector test results as evidence on a case-by-case basis. Laws of evidence in the court system do not automatically disregard these measurements as a basis for evidence and facts regarding criminal investigations or civil litigation cases.

Individuals are also concerned about what will happen during the examination. Since they are unaware of how the process works, they may be uncertain as to whether or not they want to use polygraph services. One thing is certain about a polygraph exam: you will not go through the process unaware of how it works or what to expect. Any person undergoing a polygraph examination should know that there are two parts to the test. The first part is called the pre-test, which allows the examinee to ask any and all questions or voice any concerns they may have. Further, the pre-test allows the examiner to qualify the examinee as a polygraph subject. Qualifying the person for the test involves asking about medical conditions and prescription medications they are currently taking. Persons who do not qualify as polygraph subjects include individuals with pace makers, persons who are totally out-of-touch with reality, and persons who are on heavy medications. (So-called pathological liars have never been able to circumvent a lie detector test.) The second part of the polygraph test is the review of the actual questions to be used (word-for-word) prior to conducting the actual examination. Once the questions have been reviewed and answered either yes or no, the polygraph test is administered to verify the answers given during the pre-test. People who have been examined will know the results of their lie detector testing. Written reports are also given to validate the whole process.

Everyone should be able to depend on the polygraph examiner to treat them in a courteous, fair and impartial manner. The polygraph team should put your worries to rest by thoroughly walking you through the process of the polygraph test. Furthermore, the agency should keep the information they find in strict confidence. The results of the examination for instance, can only be shown to the person who was examined and the person who requested the test.

The agency will administer all tests in a professional manner through the use of legally accepted methods and ethical practices. With careful planning, the use of scientifically established procedures, and detailed documentation, the accuracy of the polygraph examination results is enhanced.

With each and every case, polygraph testing procedures should strictly follow the law , including the Polygraph Act of 1986 set forth by the U.S. Congress, and any state or local rules and regulations that may apply. Polygraph examinations must also adhere to any regulations set by other authorities, such as the Fair Credit Reporting Act or FCRA. The use of high quality equipment in polygraph examinations will help to ensure that the needs of clients are best served. Additionally, all equipment should be well-maintained and in top condition. Computerized polygraph instruments perform a self-calibration prior to conducting each examination to ensure the validity of test results. Software updates are made available from the manufacturer as new procedures and technologies are developed.

Using the services of trustworthy agencies, you will be able to validate claims or identify fabrications and exaggerated stories with a minimum of stress.

To learn more about polygraph examinations, feel free to contact Clugston Polygraph and Investigative Services or check out our frequently asked questions page.

Clugston Polygraph and Investigative Services




Grove Office Location:
221 E 3rd St.
Grove, Oklahoma 74344

Mailing Address:
P.O. Box 452409
Grove, Oklahoma 74345-2409

Tulsa Office Location:
320 S Boston Ave.
Ste. 1130
Tulsa, Oklahoma 74103

Phone: 918-622-7008


e-mail: roy@clugston-investigations.com

Serving Northeast Oklahoma, as well as Tulsa and Oklahoma City





We comply fully with the Gramm-Leach-Bliley Act of 1999





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