How are the results of a polygraph test used in criminal and civil cases?
In most states, polygraph evidence is admitted (or not admitted) on a case-by-case basis. However, a properly conducted test given by an preeminent examiner is often given great scrutiny by a court and attorneys on the other side. Under those conditions, a passing test can less to dismissal of charges or a better deal in a plea bargain. In many instances, mostly in civil cases and family/custody courts, polygraph is actually admitted as evidence.