Professional Polygraph Examiner Based in Sebastopol, California
Ethical, forensic-quality polygraph examinations with over 10 years of experience and 3,000+ tests conducted.
DO Polygraph Inc. provides professional polygraph examination services based in Sebastopol, California.
Our work is trusted by attorneys, agencies, and private clients in high-stakes and legally sensitive matters, where accuracy, neutrality, and clear reporting are essential.
While our primary examination location is Sebastopol, we have conducted polygraph examinations throughout California and in multiple U.S. jurisdictions over the course of our practice. Many clients travel from other regions to our office based on experience and reputation.
Examination Location & Scheduling
Standard polygraph examinations are conducted in-office in Sebastopol, California and may be scheduled through this website.
Travel-based examinations are limited and are not bookable online.
Travel availability is considered on a case-by-case basis and requires direct inquiry prior to scheduling. Pricing, logistics, and availability differ from in-office examinations.
If you require a travel-based examination, please contact us directly before making any arrangements.
The Process
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Schedule an Exam
Review our schedule and find a convenient time to book. Contact us directly at 707-800-9911 or david@dopolygraph.com if you have any questions.
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Establish Case Information
Complete our intake survey through the online scheduler so we can build the examination. Email as much case information as you need to share for our examiner to prepare question sets.
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Polygraph Examination
Together we will talk through each question, carefully clarifying issues before testing. Credibility is assessed with a fully computerized analysis. Results will be known by the end of the session.
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Report
Results are processed into a report and forwarded on to the appropriate party. Results are available SAME DAY for almost all cases.
Our Approach
The truth should be holistic and human.
We developed a reputation for accurate polygraph examinations and detailed reports, but we’re also known for putting the examinee in a place to tell the truth without trauma. This is a place where examinees feel open and ready to share. We allow enough time to clarify issues, establish the truth, and review the polygraph test questions, so there are no surprises in the testing phase. The goal of the polygraph examination is to affirm the truth, not break down the examinee. For more information about approach, see the book Polygraph for Relational and Sexual Issues, or the pages About Us and Frequently Asked Questions.
We’re just as committed to the person as the truth.
DO Polygraph, Inc. excels in building examinations that help put the examinee in a place to tell the whole story, with the examiner offering empathetic and attentive focus. Examinees can terminate the test at any time. Breaks are provided to ensure examinee comfort. If significant physiological responses appear during the testing phase, the examinee has a chance to explain those responses. If you’re ready to book, go to our scheduling page and make an appointment.
Our Clients
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General Public
DO Polygraph, Inc. is California’s premier private polygraph service that specializes in sensitive issues like infidelity, abuse, sexual addiction, and recovery. We work directly with subjects and their families.
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Therapists
You can feel confident in requesting your clients to book with us directly. We are skilled at handling sensitive and confidential information and disclosures. If you have a concern feel free to inquire about the process or discuss a specific case.
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Attorneys
Polygraph adds incremental validity to any case. With DO Polygraph, Inc, you can be sure to get a polygraph examination that meets the needs of all relevant parties.
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Law Enforcement
DO Polygraph, Inc. can help with pre-employment, criminal, internal affairs testing and is PCSOT-certified, providing practical and accurate Post-Conviction Sex Offender Testing.
“Thank you for your services and your kind, compassionate manner in delivering the results.”
— Partner of person rebuilding trust after infidelity
“You’re good at this. You’re a real professional. The other polygraph examiners I’ve had haven’t been as professional. Thank you.”
— Client who undergoes regular testing.
“You are changing the way we do things. For the better.”
— Therapist
“I truly appreciate all your updates and everything, you actually amaze me… you are very organized.”
— Background Investigator