Federal Rules of Evidence – Rule 615 (through March 1, 2020)
On its own, the court may keep witnesses from hearing each other testify. And if a party requests, the court must do that unless the witness is entitled to hear the others speak because a statute says so, the witness is a party (or the attorney-designated rep of an organizational party), or the witness is essential.
At a party’s request, the court must order witnesses excluded so that they cannot hear other witnesses’ testimony. Or the court may do so on its own. But this rule does not authorize excluding:
(a) a party who is a natural person;
(b) an officer or employee of a party that is not a natural person, after being designated as the party’s representative by its attorney;
(c) a person whose presence a party shows to be essential to presenting the party’s claim or defense; or
(d) a person authorized by statute to be present.
Selected Committee Notes
The efficacy of excluding or sequestering witnesses has long been recognized as a means of discouraging and exposing fabrication, inaccuracy, and collusion. 6 Wigmore §§1837–1838. The authority of the judge is admitted, the only question being whether the matter is committed to his discretion or one of right. The rule takes the latter position. No time is specified for making the request.
Several categories of persons are excepted. (1) Exclusion of persons who are parties would raise serious problems of confrontation and due process. Under accepted practice they are not subject to exclusion. 6 Wigmore §1841. (2) As the equivalent of the right of a natural-person party to be present, a party which is not a natural person is entitled to have a representative present. Most of the cases have involved allowing a police officer who has been in charge of an investigation to remain in court despite the fact that he will be a witness. United States v. Infanzon, 235 F.2d 318 (2d Cir. 1956); Portomene v. United States, 221 F.2d 582 (5th Cir. 1955); Powell v. United States, 208 F.2d 618 (6th Cir. 1953); Jones v. United States, 252 F.Supp. 781 (W.D.Okl. 1966). Designation of the representative by the attorney rather than by the client may at first glance appear to be an inversion of the attorney-client relationship, but it may be assumed that the attorney will follow the wishes of the client, and the solution is simple and workable. See California Evidence Code §777. (3) The category contemplates such persons as an agent who handled the transaction being litigated or an expert needed to advise counsel in the management of the litigation. See 6 Wigmore §1841, n. 4.