New York Polygraph Experts

Lie Detection Specialists in New York City, Long Island, Westchester, Stamford, CT, Greenwich, CT and Fort Lauderdale, FL

Free Consultation:

  • Criminal Investigations
  • Civil Litigation Support
  • Suspected Infidelity
  • Post Conviction Sex Offender Testing
  • Relationship, Family Issues
  • Corporate & Business Matters
  • Divorce and Child Custody
  • Immigration Issues
  • Youth and Teen Drug/Alcohol Use
  • Academic Cheating Accusations

World Renowned Polygraph Examiner


Affiliations, Certifications, & Memberships

Including but not limited to
American Polygraph Association Logo

American Polygraph Association

National Polygraph Association Logo

National Polygraph Association

International Society of Polygraph Examiners

International Society of Polygraph Examiners

National Council of Investigative Security Specialists

National Council of Investigative Security Specialists

ASTM International

ASTM International

ASTM International

Associated Licensed Detectives of New York State

British & European Polygraph Association

British & European Polygraph Association

World Association of Detectives

World Association of Detectives

About Us

Who We Are and What We Do

InDepth Polygraphs provides professional, confidential polygraph examinations and lie detection testing to businesses, organizations and private individuals throughout the State of New York. Our polygraph testing can be conducted at our offices in New York City, Long Island, or Westchester County. Our mobile unit can travel to correctional facilities and other select suitable locations.

InDepth Polygraphs is a division of International Investigative Group (IIG), Ltd., a licensed, professional New York private investigation agency with over a quarter century of experience. InDepth Polygraphs and IIG are owned and operated by Daniel D. Ribacoff, a veteran private investigator, international lecturer, published author, and advanced trained New York polygraph examiner with over 26 years of experience. Mr. Ribacoff was named as one of the top 15 Private Investigators in the US.

IIG and InDepth Polygraphs have been featured in the New York Times, CNN, ABC News, CNBC, the Today Show, Natoinal Geographic Channel, The Wall Street Journal, USA Today, Inside Edition, New York Law Journal, Chicago Tribune, the Baltimore Sun, and many more. We are fully licensed, insured and bonded so you can be assured that your polygraph examination will be conducted with the highest level of professionalism and integrity at all times.

At InDepth Polygraphs, we use the latest state-of-the-art polygraph and lie detection testing equipment and our examinations are conducted only by trained, certified and experienced polygraph professionals to ensure accurate results. Mr. Ribacoff's results have been used in Federal Court, New York State Supreme Court, Family Court, Child Protection Services, Departments of Probation and Parole. He also conducts polygraphs for police departments.

When you need the services of a qualified New York polygraph examiner, call the experts at InDepth Polygraphs. Our staff of dedicated professionals will be happy to answer any questions you may have and schedule an appointment for you.

Dan answering some polygraph questions:
On NBC's TODAY Show On National Geographic's Brain Games
On The Steve Wilkos Show

Examiners on Staff

Daniel D. Ribacoff

Daniel D. Ribacoff is an American Polygraph Association (APA) School Trained polygraph examiner, having studied at the Academy for Scientific Investigative Training in Philadelphia, Pennsylvania. This APA Accredited School is owned and operated by Nathan Gordon, the past President of the American Polygraph Association and one of the world’ foremost authorities on polygraphs and forensic interviewing. He also studied under William Fleischer, a former FBI and US Customs polygraph examiner. Mr. Ribacoff has also studied at the Marston Polygraph Academy, San Bernadino, California. He holds the highest, advanced certifications in polygraph and post conviction sex offender testing. He pursues and implements the latest and most up-to-date technologies and techniques available.

Lisa J. Ribacoff

Lisa Ribacoff is the Manager of International Investigative Group, Ltd., Credibility Assessment Division with offices in New York City, Long Island, Westchester, Los Angeles, Boca Raton, FL, and London. Ms. Ribacoff has been with the firm for 9 years. She is a member of the American College of Forensic Examiners, American Society for Testing and Materials (ASTM International). She holds Advance Training certifications with accreditation from the American Polygraph Association, the National Polygraph Association and the British & European Polygraph Association (BEPA). In addition, she holds Advanced Training Post Conviction Sex Offender Testing Certification with the American Polygraph Association.

Contact Us


Polygraph and Lie Detector Testing in New York City, Long Island, Westchester, and the tri-state area

Office Hours

  • Monday - Friday - By Appointment Only
  • Saturday - By Appointment Only
  • Sunday - By Appointment Only

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