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Hamre Pi private investigations and locating missing persons in Seattle and beyond

Lie detector & polygraph services

Our team of experienced private investigators specializes in administering polygraph tests to individuals, businesses, and organizations who need to get to the truth quickly and accurately.

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Our polygraph tests are conducted by certified examiners who use the latest technology and techniques to ensure the most accurate results possible. Whether you are an attorney seeking to verify the truthfulness of a witness, a business owner investigating internal theft, or an individual trying to resolve a dispute with a neighbor, we can help.

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Our approach

At Hamre PI, we understand that every case is unique, and we will work with you to develop a customized testing strategy that meets your specific needs. Our examiners are experienced in working with a variety of clients, from individuals to large corporations, and we are committed to providing confidential, professional, and accurate testing services.

We use state-of-the-art polygraph equipment and adhere to the highest professional standards to ensure the most accurate and reliable results possible. Our polygraph testing services are available to clients throughout the country, and we can travel to your location to administer the test.

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Polygraph lie detector test services in Seattle, Bellevue, Kirkland, and surrounding areas

Types of polygraph services

Our polygraph testing services include:

Pre-employment screening

If you are hiring for a position of trust, our polygraph testing can help you identify potential red flags before making a hiring decision.

Criminal investigations

If you need to gather evidence to prove or disprove someone's involvement in a criminal case, our polygraph tests can provide valuable information.

Infidelity investigations

If you suspect your partner is cheating, a polygraph test can provide clarity and help you move forward.

Civil investigations

If you are involved in a legal dispute and need to verify the truthfulness of a witness or party, our polygraph tests can help.


What is a polygraph test?

A polygraph test, also known as a lie detector test, is a method of testing a person's physiological responses to questions to determine whether or not they are telling the truth.

How does a polygraph test work?

During a polygraph test, the examiner will attach sensors to the test subject's body to measure their physiological responses, such as heart rate, blood pressure, and breathing. The examiner will ask a series of questions, including control questions, relevant questions, and comparison questions, and will analyze the subject's physiological responses to determine whether or not they are being truthful.

Are polygraph tests accurate?

While polygraph tests are not 100% accurate, they are considered to be a valuable tool in determining the truthfulness of individuals. The accuracy of a polygraph test can be influenced by a variety of factors, such as the experience and training of the examiner, the quality of the polygraph equipment, and the behavior and demeanor of the test subject.

What types of cases can benefit from a polygraph test?

Polygraph tests can be useful in a variety of cases, including criminal investigations, employment screenings, civil litigation, and personal matters, such as infidelity investigations or family disputes.

How long does a polygraph test take?

The length of a polygraph test can vary depending on the complexity of the case and the number of questions being asked. In general, a polygraph test can take between one and three hours to complete.

Can a polygraph test be used as evidence in court?

The admissibility of polygraph test results as evidence in court varies by jurisdiction. In some cases, polygraph results can be introduced as evidence in court, while in others they cannot.

Is a polygraph test invasive?

Polygraph tests are not considered to be invasive, as they only measure the subject's physiological responses to questions and do not involve any physical or medical procedures.

Can polygraph results be faked or manipulated?

While it is possible for a test subject to manipulate their physiological responses to questions, experienced examiners are trained to detect such attempts and can take steps to ensure the accuracy of the test results.

Contact an investigator

If you need the truth, contact Hamre PI today to schedule a consultation with one of our experienced polygraph examiners. We are committed to providing you with the answers you need to make informed decisions and move forward with confidence.

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Client Reviews

  • Polygraph lie detector client review avatar
    Jason D.
    Polygraph client

    Hamre PI saved my marriage with a lie detector test. I'm so glad I trusted them to help me prove my innocence.

  • private investigation client review avatar
    Jeffrey F.
    Stolen property client

    My work van, along with my construction equipment inside, was stolen from outside my business. Steve helped me find the guy who did it and I got most of my equipment back. I highly recommend using Hamre PI for any of your private investigation needs.

  • client review avatar
    Debra J.
    Locate distant relative client

    I couldn't believe he was able to find my real dad. Now my father and I are finally building a relationship. Best decision I ever made.

  • client review avatar
    Sandra m.
    Serving papers client

    I'm really glad I chose Hamre PI. I didn't have anyone who could serve my divorce papers to my ex. They sent a guy to my ex's place to serve the papers and it went off without a hitch.

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