sniper said:
Who were present when he did that test?
Probably nobody except for a whole lot of american presidents.
The problem with polygraph tests is they can be unreliable because of the 1. underlying assumptions about physiological arousal, 2. the questioning technique used, 3. their subjectivity, 4. and counter-measures that can disguise physiological arousal and 5 the experience and skill of the examiner in analyzing the results. Their results are inadmissible as evidence in courts.
However defence lawyers will often get a private polygraph test done because 1. Lay people who run cycling organizations often do not understand how unreliable the tests can be, 2. Most law enforcement people many of whom work in anti-doping believe in these tests.
Therefore a defence lawyer can use a test where his/her client is found to be truthful as a
persuasion tool to negotiate a deal for their client in a sanctions case by pointing to the results of a truthful test. Defence lawyers hire private polygraph examiners who are often former police officers.
AC did exactly this. He had a private test which was judged to be truthful by the examiner, and I am sure his lawyers pointed to that test to try and negotiate a behind the scenes deal for a lesser sanction than the 2 years he got.