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

(As amended Pub. L. 94–149, § 1(10), Dec. 12, 1975, 89 Stat. 805; Mar. 2, 1987, eff. Oct. 1, 1987; Apr. 12, 2006, eff. Dec. 1, 2006; Apr. 26, 2011, eff. Dec. 1, 2011.)

Source: Federal Rules of Evidence, December 1, 2024, Administrative Office of the United States Courts, uscourts.gov.