STATE OF IDAHO JUDICIAL BRANCH
Supreme Court

Idaho Rules of Evidence Rule 606. Juror's Competency as a Witness.

(a)  At the Trial.  A juror may not testify as a witness before the other jurors at the trial.  If a juror is called to testify, the court must give a party an opportunity to object outside the jury's presence.

(b)  During an Inquiry into the Validity of a Verdict or Indictment.

(1) Prohibited Testimony or Other Evidence.  During an inquiry into the validity of a verdict or indictment, a juror may not testify about any statement made or incident that occurred during the jury’s deliberations; the effect of anything on that juror’s or another juror’s vote; or any juror’s mental processes concerning the verdict or indictment.

The court may not receive a juror’s affidavit or evidence of a juror’s statement on these matters.

(2) Exceptions.  A juror may testify about whether:

(A) extraneous prejudicial information was improperly brought to the jury’s attention;

(B) an outside influence was improperly brought to bear on any juror; or

(C) the jury determined any issue by resort to chance; or

(D) a mistake was made in entering the verdict on the verdict form.

(Adopted March 26, 2018, effective July 1, 2018.)