Complaint about a California polygraph examiner
Examiner charged $500 for test. Told client she failed (deception indicated). Client said she hadn't lied on a single question. Examiner suggested she try again on another day (and pay hime again).
Client went to another examiner that had far more experience yet was less costly, and didn't mention the first test or examiner. Her husband was allowed to quietly monitor the testing.
She passed.
It was discovered why she had failed the first testing (examiner's fault), but that is not a topic for a public list.