Skeptic wrote on Jan 26^th, 2003 at 8:33am:

Please don't wrack your brains for a reason why you're "failing" the polygraph.  The trick is there isn't one.  It's a fake, no matter what they say, and your "reactions" are due to being asked nerve-wracking questions, not due to dishonesty or guilt feelings.

Of course he may in fact be producing physiological reactions that polygraphers interpret as 'truthful'-- and they are simply lying about the results in an effort to get him to make damaging admissions or at least see how he reacts to such [erroneous] accusations.