§ Rule 606 Competency of Juror as Witness
Rule 606. Competency of Juror as Witness
(a) At the trial. A member of the jury may not testify as a witness before that jury in the trial of the case in which the juror is sitting. If the juror is called so to testify, the opposing party shall be afforded an opportunity to object out of the presence of the jury.
(b) Inquiry into validity of verdict in civil action. Upon an inquiry into the validity of a verdict in a civil action, a juror may not
testify as to any matter or statement occurring during the course of the jury's deliberations or to the effect of anything upon that or any other juror's mind or emotions as influencing the juror to assent to or dissent from the verdict, or concerning the juror's mental processes in connection therewith, except that a juror may testify on the question whether extraneous prejudicial information was improperly brought to the jury's attention or whether any outside influence was improperly brought to bear upon any juror. Nor may a juror's affidavit or evidence of any statement by the juror, concerning a matter about which the juror would be precluded from testifying, be received for these purposes.