NADAC Photo of Statue of Justice - NADAC In Search of Truth

NADAC Group - Polygraph Testing

British & European Polygraph Association


World Association of Professional Investigators

NADAC are the exclusive suppliers of Polygraph Services to G4S in the UK & Ireland RegionAmerican Polygraph Association

NADAC Polygraph Directors

NADAC Directors now hold key positions in Polygraph Associations.

Michael Sheilds with lie detector Don Cargill from Nadac Group and BEPA Chairman

Michael Shields was a Liverpool football fan wrongly convicted of the attempted murder of a Bulgarian barman and he was sentenced to 10 years in prison. Michael passed a polygraph in prison, which was undertaken by Don Cargill which helped towards proving his innocence.  He was later released and given a Royal Pardon
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Don Cargill (right) with Michael at his home after his release.
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POLYGRAPH LIE DETECTOR TESTING: DETECTING DECEPTION

NADAC is the largest privately owned Polygraph Company in The UK, with offices based in London, Manchester and Birmingham. In addition to undertaking lie detector testing throughout the UK, NADAC is able to provide polygraph services on an International basis.

The founding directors Cargill & Penner are the official polygraph lie detection experts for the Trisha Goddard show on channel five.

We specialise in providing highly confidential polygraph testing for the Corporate sector, Government and Private individuals.

Our examiners use the latest state of the art computerised instruments and are fully conversant with the most up to date techniques.

NADAC are the exclusive suppliers of Polygraph Services to G4S in the UK & Ireland Region.

All NADAC examiners have also undertaken specialist polygraph training for Post Conviction Sex Offender Testing (PCSOT).

NADAC`s  Managing Director Don Cargill  is the current Chairman of the prestigious British and European Polygraph Association (BEPA) as well as being a full member of the American Polygraph Association (APA).

Nadia Penner is also a Board Director of the BEPA and a full member of the APA.

All our examiners are all highly qualified, indeed our American based Director, Dan Sosnowski is regarded as one of the Worlds leading polygraph experts. He has also personally trained hundreds of examiners in his career. He is a past President of The American Polygraph Association (APA) and a Board Director of the prestigious British and European Polygraph Association (BEPA).

Don Cargill NADAC`s Managing Director and Chairman of the British and European Polygraph Association (left) is seen congratulating his Co-Director Dan Sosnowki (centre) on the evening of him becoming the President of The American Polygraph Association. Nadia Penner who is a Director of NADAC and also the British and European Polygraph Association is on the right.

Mr Sosnowski was also the leading Polygraph consultant on the UK Home Office Sex Offender Management research project team.

Our International team of examiners has also conducted tests in 10 counties from South America to Europe.

NADAC can also provide a leading multi-lingual female examiner, who is one of our main board Directors.

Whether you are a a private individual looking to verify the truth, corporate company requiring in-house security assistance, or a government agency seeking to verify specific criminal issues or activities – NADAC can help.

Please click one of the appropriate links below:-

Corporate Polygraph ServicesGovernment Polygraph ServicesPrivate Individuals Polygraph Services



Nadac are now the sole suppliers for Stoelting and Co polygraph instruments in most parts of Europe.

Since 1886, Stoelting and Co. has been a leader in manufacturing superior instruments and assessments for basic scientific research and practice. We are proud of our tradition of manufacturing and supplying superb products…and remain committed to our customers' needs through knowledgeable and prompt customer service.









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