Sexual assault trials under Article 120 of the Uniform Code of Military Justice (UCMJ) often turn on the credibility of a small number of witnesses whose accounts of the same events may differ in important details. To keep one witness from shaping testimony around what another has already said, courts use sequestration, the order that keeps witnesses out of the courtroom and apart from the trial proceedings until they testify. When someone breaks that order, the consequences are real but not mechanical. The military judge has a range of responses, and the most severe of them is reserved for the most serious violations.
The source of the rule
Witness sequestration in courts-martial is governed by Military Rule of Evidence 615. At the request of either the prosecution or the defense, the military judge orders witnesses excluded so that they cannot hear other witnesses testify, and the judge may order this on the court’s own initiative as well. The rule reflects a long-standing concern that a witness who listens to earlier testimony may, knowingly or not, conform an account to what has already been said, which undermines the reliability of the evidence.
The rule carries familiar exceptions. A party who is a natural person is not excluded, a designated representative of an entity party may remain, and a person whose presence is shown to be essential may stay. Separate statutory protections govern crime victims, including in Article 120 cases, so a victim’s presence raises its own analysis under the victims’ rights provisions rather than a simple application of the exclusion rule.
What counts as a violation
A sequestration order can be broken in several ways. A witness might slip into the courtroom and listen to testimony. A witness might receive a summary of what another witness said from a spectator, a family member, or even a party. Witnesses might discuss their accounts with each other in a hallway or by phone. In an Article 120 case, where the complaining witness, the accused, and others may have closely linked stories, even an informal recounting of testimony can create the very risk the order was meant to prevent.
Both the parties and the military judge are expected to be vigilant about these channels of leakage, including the indirect ones, because the harm to the integrity of the testimony is the same whether the witness heard the testimony directly or learned its substance secondhand.
The judge’s range of responses
When a violation comes to light, the military judge has broad discretion to decide what to do, and an appellate court reviews that decision only for an abuse of discretion. The available responses run along a spectrum.
At the milder end, the judge may allow the witness to testify but permit thorough cross-examination about the violation, so that the panel can weigh how the breach might have affected the testimony. The judge may also instruct the panel that it can consider the violation in assessing the witness’s credibility and the weight to give the testimony. In some cases the judge will hold a hearing outside the panel’s presence to determine exactly what the witness heard and whether it actually affected the account.
The judge may also consider contempt or other disciplinary measures against a person who deliberately defied the order, separate from any effect on the testimony itself.
When testimony is excluded
The most drastic remedy is to bar the witness from testifying at all. Military courts treat this exclusion as a sanction that should ordinarily be used only to address intentional or willful disobedience of the sequestration order. It is not the automatic result of every violation. Courts have recognized that excluding testimony is a severe step, and a military judge can abuse discretion by excluding a witness’s testimony as punishment when the violation was not deliberate or willful.
The reason for that caution is that exclusion does not just penalize the person who broke the rule. It can deprive a party, and ultimately the fact finder, of relevant evidence, which is a heavy cost in a case as serious as an Article 120 prosecution. So the analysis tends to focus on two things: whether the violation was willful, and whether and how the testimony was actually tainted by it. A genuinely accidental and harmless violation usually leads to a lesser remedy, while a calculated breach that contaminated the testimony is far more likely to justify exclusion.
Prejudice and appellate review
Whether the witness ultimately testifies or not, the question of prejudice runs through the whole inquiry. Prejudice under the sequestration rule is measured by whether the witness’s testimony was affected by the proceedings the witness improperly heard. A violation that had no actual influence on what the witness said causes little harm and rarely warrants a strong sanction. On appeal, both the finding of a violation and the remedy chosen are evaluated under the deferential abuse-of-discretion standard, which means a reviewing court will uphold a reasonable response by the trial judge even if a different judge might have chosen otherwise.
Bottom line
Violating a witness sequestration order in an Article 120 court-martial does not trigger a single fixed penalty. Under Military Rule of Evidence 615, the military judge chooses from a graduated set of responses, including allowing testimony subject to cross-examination and credibility instructions, holding a hearing to gauge the effect, considering contempt for a deliberate breach, and, in the most serious cases, excluding the witness’s testimony. Exclusion is reserved primarily for intentional or willful violations, and across the board the decision turns on whether the breach was deliberate and whether it actually affected the testimony, with appellate review limited to abuse of discretion.
Disclaimer
This article is provided strictly for general educational and informational purposes. It is intended to explain how the Uniform Code of Military Justice (UCMJ), the Rules for Courts-Martial, the Military Rules of Evidence, and related military administrative processes work as a matter of public legal education. It does not constitute legal advice, a legal opinion, or a recommendation about any particular case, and it is not a substitute for advice from a qualified military defense attorney who can evaluate the specific facts and command, service, and jurisdictional circumstances involved.
Reading this article, or contacting any website on which it appears, does not create an attorney-client relationship between the reader and any law firm, attorney, or author. Every court-martial, nonjudicial punishment action, administrative separation, and security-clearance matter turns on its own facts, the charged articles, the convening authority, the service branch, and the evidence, and outcomes vary widely from one case to another.
Military law also changes over time. The Military Justice Act of 2016 (effective January 1, 2019) and subsequent National Defense Authorization Acts renumbered and rewrote many punitive articles, revised the Article 32 preliminary hearing, and altered sentencing, clemency, and appellate procedures. Statutes, regulations, executive orders, the Manual for Courts-Martial, and decisions of the service Courts of Criminal Appeals and the Court of Appeals for the Armed Forces may have been amended, superseded, or reinterpreted after this article was written, and article numbers or procedures cited here may have changed.
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