Military Lawyers

Article 31 of the UCMJ, 10 U.S.C. 831, is one of the most frequently litigated provisions in military criminal practice, and alleged violations of it are among the most common grounds raised in motions to suppress statements. The honest answer to how often these claims arise is that no public agency publishes a precise count of suppression motions by category across the services. What can be said with confidence, based on the structure of military law and the volume of reported decisions, is that Article 31 is a recurring and central feature of pretrial litigation whenever the government intends to use a service member’s statement.

Why Article 31 Is Raised So Often

Article 31 provides a statutory privilege against self-incrimination that is broader in some respects than the civilian Miranda framework. Under Article 31(b), no person subject to the code may interrogate or request a statement from an accused or a suspect without first informing the person of the nature of the accusation, advising that the person need not make any statement, and warning that any statement may be used as evidence against the person. Article 31(d) provides that statements obtained in violation of the article are inadmissible. Because so many military investigations produce a statement from the suspect, and because the warning requirement is triggered in a wide range of settings, defense counsel routinely examine whether the warning was required and whether it was given correctly. When a confession or admission exists, challenging its admissibility is often the single most consequential pretrial step available, which makes Article 31 a natural and frequent basis for a suppression motion.

What the Motion Actually Litigates

A motion to suppress on Article 31 grounds usually turns on a few recurring questions. The first is whether a warning was required at all. Article 31 warnings are required when a person subject to the code questions a suspect in a law enforcement or disciplinary capacity. The Court of Appeals for the Armed Forces has framed this through a totality-of-the-circumstances analysis examining whether the questioner was acting or could reasonably be perceived as acting in an official law enforcement or disciplinary role, as reflected in cases such as United States v. Jones, 73 M.J. 357 (C.A.A.F. 2014) and United States v. Cohen, 63 M.J. 45 (C.A.A.F. 2006). The second question is whether the warning, if required, was adequate, including whether the nature of the accusation was …

Article 120 prosecutions under 10 U.S.C. 920 frequently depend on the testimony of the person who reported the offense. When that witness, who often holds protected status under victim-rights provisions, declines to testify, the case enters complicated legal territory. The refusal implicates the accused’s confrontation rights, the rules of evidence governing out-of-court statements, the witness’s own rights and any applicable privileges, and the practical question of whether the prosecution can proceed at all. Each of these considerations must be addressed by the military judge, and how they are resolved can determine the outcome.

The Confrontation Clause Sets the Baseline

The Sixth Amendment guarantees an accused the right to confront the witnesses against him, and this right applies fully in courts-martial. If the government wishes to use a witness’s prior testimonial statements but the witness does not testify and is not subject to cross-examination, the Confrontation Clause generally bars admission of those testimonial statements unless the witness is unavailable and the defense had a prior opportunity to cross-examine. A witness who simply refuses to appear or to answer does not automatically allow the government to substitute earlier statements. This is the first and most important consideration: the accused’s constitutional right to cross-examine cannot be set aside merely because the witness prefers not to testify.

Distinguishing Unwillingness From Legal Unavailability

A refusal to testify is not the same as legal unavailability, and the distinction matters. Under the hearsay framework of the Military Rules of Evidence, a declarant may be considered unavailable in defined circumstances, including a refusal to testify despite a court order. The military judge must determine whether the witness is truly unavailable in the legal sense and, if so, whether any hearsay exception applies. Even when an exception fits, the Confrontation Clause analysis remains a separate hurdle for testimonial statements. The judge therefore conducts two inquiries: whether an evidentiary path exists for the prior statement, and whether using it would violate the accused’s right to confrontation.

Compelling Testimony and Its Limits

The government may seek to compel a reluctant witness through process, and a witness who refuses to comply with a lawful order to testify can face consequences. In some cases the government may consider a grant of immunity to remove a valid Fifth Amendment basis for refusal, after which continued refusal can be addressed by the court. These tools have limits. A witness cannot be forced to give substantive …

Trauma-informed interviewing has become a familiar part of how the military investigates sexual-assault allegations under Article 120 of the Uniform Code of Military Justice. The approach grew out of an effort to question people who report sexual assault in a way that avoids re-traumatizing them and that accounts for how stress can affect memory. It is widely taught and used. It is also genuinely contested in the scientific community. Both facts are important, because the technique shapes the evidence in a case while raising real questions about reliability that surface in the courtroom.

What Trauma-Informed Interviewing Is

Trauma-informed interviewing refers to a family of techniques designed to gather information from someone who has experienced a traumatic event without compounding the harm. The best-known military example is the Forensic Experiential Trauma Interview, commonly abbreviated FETI, which was developed by Russell Strand, a chief in the Behavioral Sciences Education and Training Division at the U.S. Army Military Police School.

The method draws on several sources. It borrows open-ended, non-leading questioning techniques associated with child forensic interviewing, where the goal is to avoid influencing the subject. It incorporates ideas from critical-incident stress practices, and it is justified by reference to research on the neurobiology of trauma. Rather than pressing a witness with rapid, pointed questions, the interviewer invites the person to share what they are able to recall, including sensory and experiential details, on the theory that trauma encodes memory differently and that a gentler approach yields more complete and accurate recall while reducing the risk of revictimization.

Why the Military Adopted It

The appeal in the Article 120 context is clear. Sexual-assault investigations depend heavily on the account of the person reporting, and a harsh or skeptical interview can deter reporting, distress the witness, and produce a fragmented account that is later read, perhaps unfairly, as evidence of fabrication. A trauma-informed approach aims to address all three concerns: to encourage reporting, to treat the reporting person humanely, and to elicit a fuller account. For investigators handling emotionally charged cases, the technique offers a structured alternative to confrontational interrogation styles that were never designed for traumatized witnesses.

The Scientific Controversy

The technique is not without serious criticism, and that criticism is central to its role in litigation. Memory researchers have challenged the scientific foundations of FETI in particular. Elizabeth Loftus, a prominent memory researcher at the University of California, Irvine, has stated that …

An acquittal on an Article 120 charge is one of the most protective outcomes a service member can receive, and for good reason. The protection against being tried twice for the same offense is a foundational principle of both the Constitution and military law. As a general rule, a service member who is acquitted of an Article 120 offense cannot be retried for that same offense. There are limited nuances worth understanding, but the core protection is strong.

The Constitutional and Statutory Foundation

The Fifth Amendment provides that no person shall be subject for the same offense to be twice put in jeopardy. This protection applies to members of the armed forces, and Congress has implemented it in the military justice system through Article 44 of the Uniform Code of Military Justice, the former jeopardy provision.

Article 44 states that no person may, without consent, be tried a second time for the same offense. It is the military’s direct codification of the double jeopardy guarantee, and it governs when and how the protection attaches in a court-martial.

When Jeopardy Attaches

Double jeopardy protection is not triggered the moment charges are preferred. Under Article 44, jeopardy attaches in a court-martial when the introduction of evidence on the general issue begins. Once that occurs, the protection is in place even if the trial is not completed.

This timing matters. It means that a service member who reaches the point where evidence has been introduced and is then acquitted has the full benefit of the bar against retrial for that offense.

An Acquittal Is Final

A genuine acquittal is final. When the trier of fact finds the accused not guilty of an Article 120 offense, the government may not retry the accused for that same offense. The protection also extends to lesser included offenses arising from the same conduct, because a lesser included offense is treated as the same offense for double jeopardy purposes. The prosecution cannot respond to an acquittal by recharging the conduct under a related lesser offense in an effort to obtain a different result.

This finality applies even if the government believes the verdict was wrong. The government generally has no right to appeal an acquittal in order to retry the accused, because doing so would offend the very protection the double jeopardy clause provides.

Limited Situations That Are Not Barred

The protection against retrial is broad, but it …

Yes. When a service member’s statement is taken in violation of the law, the damage often does not stop with the statement itself. Evidence that investigators discover because of that tainted statement can also be excluded from a court-martial. This is the military application of the doctrine known in American law as fruit of the poisonous tree, and it is built directly into the Military Rules of Evidence. Understanding how derivative evidence becomes inadmissible is essential for any accused whose case began with an improper interrogation.

The starting point: an involuntary or unwarned statement

Two related rules govern this area. Military Rule of Evidence 305 deals with warnings about rights, including the warning required by Article 31 of the Uniform Code of Military Justice and the warning required when counsel is involved. A statement obtained in violation of that rule is treated as involuntary. Military Rule of Evidence 304 then provides the consequence: an involuntary statement of the accused is inadmissible if the defense makes a timely motion or objection.

So the first link in the chain is the improper statement. It might be involuntary because it was coerced, because the required Article 31 warning was never given before official questioning of a suspect, or because the accused’s right to counsel was disregarded. Whatever the specific defect, the rules classify the statement as involuntary and subject to exclusion.

How the taint spreads to derivative evidence

The crucial point for this question is that MRE 304 does not stop at the statement. By its terms, the rule reaches an involuntary statement of the accused or any evidence derived from that statement. Evidence derived from an unlawful statement is the fruit of the poisonous tree. If investigators learn the location of a weapon, a document, a witness, or some other piece of evidence only because the accused was improperly made to talk, that downstream evidence carries the taint of the original violation and can be suppressed along with the statement.

The logic is straightforward. If the system excluded only the statement but freely admitted everything the statement led to, the protection would be hollow. Investigators could violate the rules, suppress the words themselves, and still reap the full investigative harvest. The derivative evidence doctrine closes that gap by reaching the consequences of the violation, not just the violation itself.

Limits on the doctrine

The taint is powerful but not boundless. American law, …

Witnesses can decide an Article 120 case under the Uniform Code of Military Justice (UCMJ). Sexual assault charges frequently come down to credibility, context, and the meaning of behavior before, during, and after an encounter, and the right witnesses can supply the perspective and information that a panel needs to acquit. Which witnesses help most depends on the defense theory, but several categories tend to carry the greatest weight, and each must be developed and presented within the limits of the Military Rules of Evidence (MRE).

Fact witnesses who observed the relevant events

The most directly useful witnesses are often the people who were present around the time of the alleged offense. Friends, fellow service members, or others who saw the parties interact can describe what the alleged victim and the accused actually did and said before and after the encounter. Observations that the parties were behaving affectionately, communicating coherently, walking and functioning normally, or leaving together voluntarily can rebut a theory of force or incapacity. These witnesses are valuable precisely because they speak to objective conduct rather than to opinion, and conduct that is inconsistent with the prosecution’s narrative can create reasonable doubt.

Witnesses who establish capacity in an intoxication case

When the government’s theory is that the alleged victim could not consent due to intoxication, witnesses who interacted with that person near the relevant time become critical. People who observed coherent conversation, deliberate decisions, texting, or other functional behavior can help show that the person was capable of consenting, which is the legal question under Article 120, even if the person had been drinking. Because intoxication is not the same as incapacity, lay witnesses who describe what they actually saw can be more persuasive on capacity than abstract argument.

Expert witnesses

Experts can address issues a lay panel cannot evaluate on its own. A forensic toxicologist may explain the effects of alcohol and the difference between impairment and incapacity, and may address phenomena such as alcohol-related memory gaps that are sometimes mistaken for unconsciousness. A psychologist or memory expert may explain how memory forms and degrades and why a fragmentary or shifting account does not necessarily indicate either truth or fabrication. A digital forensics expert may authenticate and interpret messages and metadata. Each expert must qualify under MRE 702, offering testimony grounded in sufficient facts, reliable methods, and a sound application of those methods, and the military judge …

Non-judicial punishment, imposed under Article 15 of the Uniform Code of Military Justice (UCMJ), is the disciplinary track commanders use for minor offenses without resorting to a court-martial. Because it feels less formal than a trial, service members sometimes assume the rights that protect them in a criminal case do not reach it. When it comes to Article 31, that assumption is wrong in an important way. The warning requirement attaches to the questioning, not to the forum the case eventually lands in.

Article 31 attaches to interrogation, not to a particular proceeding

Article 31(b) provides that no person subject to the UCMJ may interrogate, or request any statement from, an accused or a person suspected of an offense without first informing them of the nature of the accusation, advising them of the right to remain silent, and advising them that any statement may be used as evidence against them in a trial by court-martial. The trigger is official questioning of a suspect, regardless of whether the matter is ultimately handled at court-martial, through administrative action, or by non-judicial punishment.

So when a commander or an investigator questions a service member who is suspected of an offense, and the questioning is for a law enforcement or disciplinary purpose by someone acting in an official capacity, the Article 31 advisement is required. The fact that the command is contemplating an Article 15 rather than a referral to court-martial does not switch off the obligation to warn before that interrogation occurs.

Why the warning is required before Article 15 questioning

The premise of Article 31 is the coercive pull a service member feels when a superior in rank or position asks questions. Congress enacted Article 31(b) in 1950 precisely to dispel that inherent compulsion to answer a superior. That coercive dynamic is fully present in the lead-up to non-judicial punishment, because the questioner is frequently the suspect’s own commander or someone in the chain of command. If anything, the pressure to talk can feel more direct when the person asking holds disciplinary authority over the member.

For that reason, an Article 31 advisory must precede questioning of any member suspected of a UCMJ offense when the questioning relates to that offense, and a contemplated Article 15 is squarely within that scope.

The rights a member retains inside the Article 15 process itself

The Article 15 procedure layers its own protections on top …

Article 31 of the Uniform Code of Military Justice and Military Rule of Evidence 304 work together to govern when a service member’s statement may be used as evidence. Article 31 is the substantive protection; it forbids compelled self-incrimination and requires a rights warning before questioning. Military Rule of Evidence 304 is the procedural and evidentiary rule that enforces those protections in the courtroom and adds a separate safeguard against convictions built on uncorroborated confessions. Understanding how the two interact explains why some statements are admitted, others are suppressed, and why even a voluntary confession is not automatically enough to convict.

What Article 31 Protects

Article 31 has several parts. Subsection (a) bars compelling any person subject to the UCMJ to incriminate himself. Subsection (b) is the well-known warning requirement: no one subject to the code may interrogate, or request a statement from, an accused or a suspect without first informing him of the nature of the accusation, advising him that he does not have to make any statement about the offense, and warning that any statement may be used against him at a court-martial. Subsection (d) provides the enforcement teeth, declaring that no statement obtained in violation of the article, or through coercion, unlawful influence, or unlawful inducement, may be received in evidence against the accused at trial.

Article 31 is the military’s analog to Fifth Amendment protection, and in important respects it is broader, because the warning requirement can attach in situations beyond formal custodial interrogation. The article tells us what conduct violates a service member’s rights. It does not, by itself, lay out the courtroom mechanics for keeping the resulting statement out or for testing its reliability. That is the work of Military Rule of Evidence 304.

What Military Rule of Evidence 304 Does

Military Rule of Evidence 304 is the rule governing the admissibility of confessions and admissions. It is the vehicle through which an Article 31 violation is litigated at trial, and it carries the separate corroboration requirement for confessions.

When the defense moves to suppress a statement, the burden is on the government to establish the statement’s admissibility. The military judge must find by a preponderance of the evidence that the statement was made voluntarily under the totality of the circumstances. Courts examine whether the statement was the product of an essentially free and unconstrained choice, weighing the relevant factors in light of the …

For a career service member, retirement represents years of accumulated service translated into lifetime income and benefits. An Article 120 charge, and especially a conviction, threatens that future in ways that reach far beyond the courtroom. The impact depends heavily on the outcome of the case and on how close the member is to a vested retirement. This article explains how charges and convictions under Article 120 of the Uniform Code of Military Justice affect retirement, separating the distinct mechanisms at work.

Charges versus convictions

It is important at the outset to distinguish a charge from a conviction. A pending Article 120 charge, by itself, does not strip a member of retirement. But it can disrupt the path to retirement in practical ways. A member under charges may have a retirement request held in abeyance, may be flagged so that favorable personnel actions are suspended, and may be unable to retire until the legal matter is resolved. The most severe financial consequences, however, flow from a conviction and the sentence that follows.

The punitive discharge and its effect on retirement pay

The central mechanism is the punitive discharge. A conviction under Article 120 commonly carries a punitive discharge, a dishonorable discharge or bad-conduct discharge for enlisted members, or a dismissal for officers.

A punitive discharge has a direct effect on retirement eligibility. For a member who has not yet completed the service required to qualify for retirement, a punitive discharge ends the career before the pension vests, eliminating retired pay. For a member who has already qualified for retirement, the analysis is more complicated and turns on the circumstances of the discharge and conviction; a punitive discharge can still jeopardize the ability to retire in the normal course and can affect benefit eligibility. Because the stakes differ so much depending on years of service, this is one of the first issues experienced defense counsel evaluates.

Forfeiture of pay and reduction in grade

A court-martial sentence for an Article 120 offense can include forfeiture of all pay and allowances and, for enlisted members, reduction in grade. Forfeitures take income during and after the proceeding, and a reduction in grade lowers the base figure on which any retirement calculation would rest. Together with a punitive discharge, these components can convert what would have been a stable retirement into a near-total loss of military financial benefits.

Collateral consequences that compound the loss

Beyond …

Article 120 cases under the Uniform Code of Military Justice often begin with a command becoming aware of an allegation and setting an investigation in motion. How that early, command-influenced process unfolds can shape the fairness of everything that follows. When commanders act within their lawful authority, an investigation gathers facts and protects the rights of everyone involved. When command involvement crosses into improper pressure, it can taint the proceeding and undermine the integrity of the case. The governing concern is unlawful command influence.

How command involvement enters an Article 120 case

Commanders have responsibilities for good order and discipline, and they frequently learn of sexual assault allegations first. A command may order a preliminary inquiry, refer the matter to law enforcement, impose lawful protective measures such as a military protective order, or make personnel decisions while an investigation proceeds. These steps are ordinary and lawful when done properly.

At the same time, the modern military justice system has deliberately separated the most serious decisions in covered sexual offense cases from the traditional chain of command. Independent special trial counsel now hold authority over key prosecutorial decisions in these cases, a reform intended to reduce the appearance and reality of command pressure. The role of the commander in deciding whether to prosecute a covered offense has been narrowed for precisely this reason.

Unlawful command influence and why it matters

Article 37 of the UCMJ, 10 U.S.C. 837, prohibits unlawfully influencing the action of a court-martial. No person subject to the code may attempt to coerce or, by unauthorized means, influence the findings or sentence of a court-martial or any of its members. The article also forbids deterring a potential witness from participating in the investigatory process or testifying. Unlawful command influence has been described as the mortal enemy of military justice because it strikes at the fairness and the perceived fairness of the entire system.

Courts recognize two forms. Actual unlawful command influence is direct improper manipulation of the process, such as a commander pressuring panel members toward a particular result or discouraging witnesses from cooperating with the defense. Apparent unlawful command influence is conduct that would cause an objective, disinterested observer to harbor significant doubt about the fairness of the proceeding, even without proof that the outcome was actually affected. Both can be grounds for relief.

Particular pressures in sexual assault cases

Article 120 prosecutions arise within an environment …