Private Investigator and Polygraph Examiner

Dan Ribacoff is an International Lecturer on credibility assessment, as well as a published author. He is also an international television personality.

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Named as One of the Top 15 Investigators in the U.S

Dan has over 30 years of investigative experience.

Founder and President of International Investigative Group, Ltd.

Dan Ribacoff has studied at the NYPD police academy, Nassau County Police Academy, Academy for Scientific Investigative Training, Marston Polygraph Academy, PEAK Credibility Assessment Training Center and Backster School of Lie Detection. He now serves as the Founder and President of International Investigative Group, Ltd.

Since 1990, Dan Ribacoff and International Investigative Group have been private eyes, delivering results. The company has solved over 10,000 cases worldwide with its diverse team of licensed expert Private Investigators and former law enforcement.

  • Celebrity Divorces
  • International Child Abductions
  • Armored Truck Robberies
  • Stolen Art Recovery
  • and much more

APA School-Trained Polygraph Examiner

It's no wonder that Dan Ribacoff has been nicknamed "The Lie Detective". Dan is one of the world's top polygraph experts and has delivered the truth for those who need it most. He has been the sole polygraph examiner on the Steve Wilkos Show for the past 11 seasons and has made guest appearances on Impractical Jokers, Millionaire Matchmaker and Brain Games.

Dan Ribacoff conducts polygraph tests for criminal, civil, family, immigration, Title IX, academic cheating, relationship issues, and all other testable issues. He has lie detection polygraph offices in NY, CT, FL and CA.

With over 30 years of investigative experience, Dan is responsible for clearing thousands of innocent people accused of crimes. Recently, he helped exonerate Valentino Dixon, who was wrongfully convicted of murder and imprisoned for 27 years.

  • APA Advanced Certified Polygraph Examiner
  • APA Advanced Certified PCSOT
  • Member of the National Polygraph Association
  • Host of Internationally Syndicated TV Series "The Lie Detective"

Learn more about Dan's businesses

Allow Dan and his staff to assist you with your next case or project.

International Investigative Group, Ltd

Surveillance, Investigations, Background Checks, Due Diligence

Indepth Polygraphs

Polygraphs, Lie Detector Tests


"Dan is the private investigator to the stars."
Tracy Morgan
Actor / Comedian
“Dan has taken his exceptionally honed investigative skills and aptly translated them to layman's terms for the average user.”
Ed Vogt
Thirty year U.S Marine Corps Interrogator and Counterintelligence Officer
“Dan Ribacoff is an extraordinary investigator and one of the top experts in the field of polygraph and credibility assessment. He frequently lectures to attorneys and judges in continuing legal education courses.”
Lowell J. Sidney
Attorney / Former Brooklyn Assistant District Attorney

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