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Since 1996 we have offered the best polygraph testing services with the latest computerized technology to numerous agencies, individuals, and families. Our professional, experienced staff will provide you with the excellent service you deserve.


Owner and operator of the Virginia School of Polygraph.



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Employment Polygraph checks to take the unpleasant surprises out of a new hire.

Attorney Pre-Trial 


Attorneys want and need a professional expert that can give them an accurate test that can hold up in court and in hearings.

Relationship Struggles

Healthy relationships involve honesty, trust, respect, and open communication between partners.

Family Conflicts


Sometimes family conflict can be too hard to solve on your own and you might need some external support to mediate the situation.

Dispute Resolution

It’s best to get extra support before the conflict causes permanent damage to family relationships.

Sexual Accusations


Our years of experience in asking probing questions will bring everything out into the open.



Our goal at Northern Virginia Pre-Employment & Polygraph Services is to provide our clients with professional polygraph lie detector services that meet or exceed all ethical and confidential standards within the polygraph field today. We pride ourselves on being recommended by law enforcement and prosecutors, and our results are taken into consideration on cases under investigation or if/how the government will proceed or not proceed with criminal or civil cases. Many cases we get involved in are, "he said she said" cases, where little or no evidence for and/or against either party is present, which is why our goal and obligation to every client is to provide them with the most accurate and unbiased examination possible, without any outside influences.

At Northern Virginia Pre-Employment & Polygraph Services, we understand that every individual has experienced the ups and downs of life, which no one is exempt from. It is our responsibility and duty to treat every client like we would want to be treated if faced with the same situation and provide not only professional services, but also a level of personal understanding, and compassion while dealing with their private situations. We operate out of Manassas and Richmond Virginia to ensure we reach everyone in the state when they need our services. 

Who Uses Our Services

  • Marital or Relationship Issues

  • State Probation / Parole Departments

  • Child Protective Services

  • Mental Health Exams

  • Substance Abuse / Sex Offenders

  • Therapy Agencies

  • Law Enforcement Agencies

  • Attorney / Client Exams

  • Legal Agencies

  • Executive and local security

  • Court Orders for Treatment Plans

  • Community Corrections Agencies

  • Legal Defense Issues

  • Pre-Employment Requirements

  • Private Business Exams




Brennan DeBow 


Tel: 571-465-1207

Tel: 123-456-7890


Juliyet Carrington




Darryl DeBow 


Brennan DeBow 
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(703) 396-7659

Guy Morgan
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(804) 641-7489

Rahsaan Wigfall 
Richmond Examiner
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(703) 396-7659

Krista Reagan 
Operation's Manager


Northern Virginia Polygraph

7885 Coppermine Rd
Manassas, VA 20109

(703) 396-7659

1700 Huguenot Rd. Suite E

Midlothian, VA 23113

(804) 641-7489


Tel: (703) 396-7659

Social Media 

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For any general inquiries or scheduling an appointment please fill in the following contact form:

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If you have to take a Poly you may as well take one from someone who has been doing it for years and runs the Virginia School of Polygraph.

           Mike K.


In my opinion, Northern Virginia Polygraph is the most professional and reliable polygraph organization in the tri-state area. Owner, Darryl L. DeBow, CCE, CFLE, is former law enforcement and is committed to truth and justice. His service goes above and beyond minimum requirements, triple scoring results via computer AND hand scoring, for a four-point measure of answers.

I could not have made a better choice than Northern Virginia Pre-Employment & Polygraph Services.  Darryl DeBow, the respected owner-operator, could not have been more helpful.  

Richard R.

Kimberly M.

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