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 to so testify, the opposing party shall be afforded an opportunity to object out of the presence of the jury.
Upon an inquiry into the validity of a verdict or indictment, 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 indictment 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, or as to any threats of violence or violent acts brought to bear on jurors, from whatever source, to reach a verdict, or as to whether a juror gave false answers on voir dire that concealed prejudice or bias toward one of the parties, or in order to correct an error made in entering the verdict on the verdict form. 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.
(Amended effective January 1, 1990; amended effective July 1, 2016.)