Attorney & Criminal Defense Testing

criminal defense polygraph

Wrongfully accused and need a lie detector test?  Polygraph is used extensively by attorneys who wish to provide the best possible defense for their clients. Most attorneys will submit their own clients to the exam, while others will use the polygraph to verify statements made by witnesses and other parties to litigation. Now known as Psychophysiological Detection of Deception (PDD), an experienced examiner can provide evidence in connection with any type of criminal or civil matter. Our examiners have a great deal of experience working with attorneys, both in private and government practice, and have aided thousands of clients in preparing defenses that would otherwise have been unavailable to them.

With the 1998 establishment of polygraph (Forensic Psychophysiology) standards by ASTM, polygraph has gained great strides in credibility with the scientific community. These standards, approved by a combined body of experts, now provide a template for the increased acceptabilty of polygraph results.

Contrary to popular belief, polygraph is not per-se inadmissible in court proceedings. Admissibility standards are different in each jurisdiction. Some jurisdictions allow polygraph evidence, either stipulated or un-stipulated, some prohibit polygraph evidence altogether, and many others allow the judge to decide admissibility on a case-by-case basis. The Daubert case is presently the standard for the admission of scientific evidence, which includes polygraph, although some jurisdictions still rely on the older Frye standard. In reality, most polygraph results are used outside of the courtroom in pre-trial negotiations, plea bargaining, sentence recommendations, and witness verification or impeachment.

Civil and family courts are more flexible when allowing polygraph evidence, as the admissibility requirements in these venues do not need to meet the Daubert or Frye standards.

Here is a link to our page about proper polygraph question design.

Wrongfully convicted of a crime?  We can help strengthen your appeal bid.

If the person to be tested is incarcerated in a jail, prison, or correctional institution, we can still provide this exam in most cases, but the exam will probably need to be coordinated through an attorney.  Contact us directly for more information or for a price quote.

If necessary, we can refer you to experts able to testify to the scientific foundation and credibility of polygraph.

Please contact us directly at with any questions.

Michael Martin, President
Global Polygraph Network®


Established in 1987, Global Polygraph Network ® is the world’s largest and most trusted polygraph (lie detector) company with services available at hundreds of locations by highly-trained experts all over the world. Avoid “discount” polygraph frauds and “over the phone” testing scams. We only provide real polygraphs by real examiners. Trust our A+ BBB rating, up-front pricing, and written guarantee.