[DennisP]

From the article:

> Piper says that though they know these kinds of tests can be unreliable, being confronted with the chance to take one can filter out disingenuous defendants. Regardless of the results of the test - which are inadmissible at trial due to issues with the reliability of the technology - the assistant state's attorney (ASA) in charge of the case would also perform a "de novo" or "from the beginning" review of all the evidence.

So basically, the polygraph is a bluff.