Trusted by prosecutors and defense attorneys throughout Texas. Jerry D. Thomas brings U.S. State Department–level training, 39+ years of law enforcement experience, and a reputation for impeccable courtroom integrity to every engagement.
Polygraph is a powerful tool throughout the litigation cycle — from pre-trial investigation to sentencing advocacy. Here is how legal professionals across Texas engage Thomas Polygraph Services LLC.
Assess client credibility before building case strategy. A private examination helps you understand the facts before prosecutors do — and shapes how you approach discovery, plea discussions, and trial preparation.
Passing a polygraph examination conducted by a credentialed, APA-member examiner gives prosecutors objective data that can meaningfully shift plea offer calculations — particularly in cases where credibility is the central issue.
In jurisdictions where both parties stipulate to admissibility, polygraph results can be introduced at trial. Jerry's courtroom experience and ability to explain the science in lay terms has made him a trusted expert witness.
Polygraph examinations ordered as a condition of deferred adjudication or probation are conducted under strict protocol. Jerry coordinates directly with supervision officers and treatment providers as required.
Evaluate the reliability of key witnesses before putting them on the stand — or before opposing counsel does. A private assessment can reveal inconsistencies and sharpen cross-examination strategy.
Before your client sits across from opposing counsel, know exactly where the vulnerabilities are. A private polygraph examination prior to deposition identifies areas of deception, inconsistency, or elevated stress response in your client's account — while you still have time to address them. Jerry provides the attorney with a clear picture of where the client's story holds and where it doesn't, allowing you to prepare more strategically, anticipate problem areas, and avoid surprises in the deposition room. This is not witness coaching — it is intelligence-gathering that puts the attorney in control of the preparation process. Examination findings are reported exclusively to the retaining attorney and are not used to alter, suggest, or influence the client's account in any way.
Post-Conviction Sex Offender Testing (PCSOT) requires advanced training and specialized protocols. Jerry holds formal PCSOT training and has conducted hundreds of examinations in this high-stakes area for both defense and supervision contexts.
Internal workplace investigations, employment disputes, insurance fraud, civil theft, and breach of trust cases all benefit from credibility assessment. Note: EPPA restricts private-sector pre-employment use — exemptions apply.
Jerry will review polygraph reports and examination recordings conducted by other examiners — identifying protocol deviations, question construction errors, and reliability concerns — giving you a precise picture of what you can and cannot rely on.
Working with JD is such a pleasant experience. He is always well prepared and eager to learn what he can do to make the case the strongest it could be, without compromising the truth. JD is always honest and conducts himself with the utmost integrity: if the science does not support it, he will not speculate or guess, which is an essential trait in a good detective and polygraph examiner.
JD stays current with his education and any evolving science in his area, so that I know I can trust his work. Furthermore, when JD takes the stand, I know the jury is getting the truth. JD excels at explaining his work in terms that a lay person can comprehend, allowing the jury to understand his process and the science behind it.
JD was not only an asset to me on those cases in which he did the polygraph; he was also of invaluable assistance to me when I had a report from another examiner — evaluating it with precision and fairness, never denigrating others' work.
A Polygraph Examiner Who Performs Under Oath
What sets Jerry apart is a career built on truth-seeking in adversarial environments — decades of law enforcement investigation, formal polygraph training under nationally recognized examiner Mark Handler, and international service as a U.S. State Department polygraph instructor.
Working with Thomas Polygraph Services LLC as an attorney is straightforward. Here is the typical process from initial contact through final report delivery.
Call or text to discuss the matter. Jerry will advise on exam type, question structure, and whether polygraph is strategically appropriate for your case. No charge for consultations.
The attorney provides the issues and topics to be addressed; the examiner controls all question construction. Proper polygraph question formulation is a specialized skill developed through formal training — poorly constructed questions are a leading cause of unreliable results and examination challenges. Jerry will work with you to understand the facts of the matter, then apply his training to develop questions that are defensible, properly structured, and yield clean data.
Subject is examined at the Montgomery office or, for agency matters, at an agreed-upon location. Pre-test interview, in-test data collection, and chart analysis are conducted under APA standards. Note: On-site travel examinations are subject to additional fees covering drive time, and where applicable, airfare and hotel — confirmed at the time of scheduling.
Written report delivered same day or next business day. Report includes exam methodology, physiological data summary, and the examiner's professional opinion — formatted for legal use.
Jerry is available post-report to answer attorney questions, review opposing examinations, and assist in preparing for Daubert or other evidentiary hearings as needed.
Available to testify as an expert witness on a case-by-case basis, subject to scheduling and scope confirmation at the time of engagement. Jerry's experience explaining the science to lay juries — praised directly by a 20-year prosecutor — makes him an effective and credible courtroom presence.
A clear-eyed understanding of how polygraph evidence works in Texas helps attorneys use it most effectively.
The following is general informational context only and does not constitute legal advice. Admissibility standards vary by jurisdiction and case-specific circumstances. Attorneys should conduct independent legal research applicable to their matter.
Texas courts generally follow the rule that polygraph results are inadmissible without a pre-trial stipulation between both parties (Tex. R. Evid. 702; Castillo v. State). However, strategic uses outside of direct admission are numerous:
Not all polygraph examinations are equal. Texas courts scrutinize technique under Daubert/Kelly standards. APA-validated techniques — including the Comparison Question Test (CQT) — have the strongest research foundation:
If the prosecution or opposing party introduces a polygraph result, Jerry can review the examination for:
Thomas Polygraph Services LLC is the only provider in the Houston area offering both traditional polygraph and EyeDetect, enabling a successive hurdles protocol. For pre-employment law enforcement screening:
Pricing varies based on examination type and complexity. Call to confirm pricing for your specific matter — same-day and rush scheduling are often available.
Criminal defense, civil matters, and specific-issue investigations. Includes pre-test interview, data collection, analysis, and written report. Most common for attorney referrals.
Law enforcement agency hiring. Volume pricing available for agencies conducting multiple exams. Includes full written report formatted for agency file requirements.
Post-conviction sex offender testing under supervision and treatment protocols. Coordination with supervising officers and therapists included. APA/JPCOT-compliant methodology.
Courtroom testimony, opposing examination review, or Daubert hearing preparation. Rate discussed based on scope of engagement and travel required.
Call or text for immediate response. Jerry personally handles all attorney consultations — no intake coordinator, no voicemail labyrinth. You will speak directly with the examiner who will conduct your examination.
Same-day and next-day appointments are frequently available. For urgent matters, call directly.