I thought this might be of interest to the readers:

http://caselaw.lp.findlaw.com

doing a search for 'polygraph' elicited many results:

http://caselaw.lp.findlaw.com/scripts/casesearch.pl?court=circs&CiRestriction=po...

I include the following passage from USA v CORDOBA:

"the district court made the following findings:

      The reliability of polygraph testing fundamentally
      depends on the reliability of the protocol followed
      during the examination. After considering the evi-
      dence and briefing, the court concludes the proposed
      polygraph evidence is not admissible under Fed. R.
      Evid. 702. Although capable of testing and subject to
      peer review, no reliable error rate conclusions are
      available for real-life polygraph testing. Addition-
      ally, there is no general acceptance in the scientific
      community for the courtroom fact-determinative use
      proposed here. Finally, there are no reliable and
      accepted standards controlling polygraphy. Without
      such standards, there is no way to ensure proper pro-
      tocol, or measure the reliability of a polygraph
      examination. Without such standards, the proposed
      polygraph evidence is inadmissible because it is not
      based on reliable `scientific knowledge.'"