Polygraph Professionals, Lie Detection Service, Fresno, CA

Membership and Affiliations

A.P.A. -American Polygraph Association

C.A.P.E. - California Association of Polygraph Examiners

A.A.P.P. - American Association of Police Polygraphists

C.C.O.S.O. - California Coalition On Sexual Offending

Licenses & Commissions

A.P.A. & C.A.P.E. - Accredited Polygraph Examiner (Backster School of Lie Detection

A.P.A. - Certified Post Conviction Sexual Offender Polygraph Examiner P.C.S.O.T.

C.A.P.E. - Certified Polygraph Examiner with Certification in P.C.S.O.T.

A.A.P.P. Certified Polygraph Examiner

P.I. - Private Investigator, Lic. #24505

P.P.O. - Private Patrol Operator, Lic. #15390

Process Server - Registered #S200510000008


Polygraph Professionals is dedicated to providing a valid and reliable means to verify the truth and establish the highest standards of moral, ethical and professional conduct in the polygraph field. All examinations are absolutely confidential - the examinee must give written authorization for the release of any information regarding the test.

This web site is designed to provide accurate information regarding polygraph (Lie Detection) testing in general and specific to Polygraph Professionals.

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Scott H. Stava

Mr. Stava retired from law enforcement in 2006, after 32 years of dedicated service. He is currently an A.P.A (American Polygraph Association) accredited Polygraph Examiner with certification from C.A.P.E. and A.A.P.P.. He is also certified as a "Post Conviction Sex Offender" examiner.

Mr. Stava is a forensic law enforcement examiner who specializes in "truth verification." All examinees are presumed truthful and every effort is made to thoroughly explain the polygraph process including how and why it works so well in determining whether or not the examinee is in fact telling the truth.

Mr. Stava and his associates are graduates of the prestigious, world-renowned and **A.P.A. (American Polygraph Association) approved** "Backster School of Lie Detection" and are retired/active law enforcement officers with well over 50 combined years of experience.

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Sarah Parker

Sarah Parker joined our firm in 2011. She completed her Master's degree in 2006 and is a grduate of the Marston Polygraphy Academy. She is a member of the APA (American Polygraph Association) and is certificated as a PCSOT. (Post Conviction Sex Offender) Examiner.


William "Bill" Lawrence
(Bay Area)

  • A.P.A. Member
  • C.A.P.E. Certified Member
  • P.C.S.O.T. Certified Examiner

Alejandro "Alex" Barba
(Central Valley)

  • Spanish Speaking Examiner
  • A.P.A. Member
  • Certified P.C.S.O.T. Examiner


  • Private: Family issues; Infidelity, Theft, Drug use, etc.
  • Legal: Defense Attorney, Law Suites, Family Court, Custody Issues, etc.
  • Pre-employment: Law enforcement, Armored Transport, etc.
  • P.C.S.O.T.(Post Conviction Sex Offender Testing)
  • E.P.P.A. (Employee Polygraph Protection Act): Employer generated for theft, embezzlement issues, etc.

To learn more about the polygraph procedure please visit our FAQ page or you may contact us. If you are in need of a Private Investigator, please click here.

We are located in Northeast Fresno, CA on Perrin Ave. To view a map of our location click here.


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