In some situations, a properly planned and strategically timed polygraph may be useful in grand jury presentations or negotiations. However, polygraphs should never be taken casually or at the request of law enforcement without legal guidance.

If a polygraph is considered, it should be:

•       Coordinated only through defense counsel (this can preserve confidentiality if the results are uncertain or unfavorable)
•       Conducted by a qualified examiner selected for strategic reasons
•       Used as part of a broader defense plan, not in isolation

Taking a polygraph arranged by police or investigators — without counsel — can seriously harm a case. Whether a polygraph is appropriate depends on the facts, timing, and posture of the case.