Article 31(b) of the Uniform Code of Military Justice is the military’s central protection against compelled self-incrimination during questioning. It is broader than the civilian Miranda warning in important ways, and it imposes a short list of specific statements that an official must make before asking a service member about a suspected offense. This article explains exactly what the statute requires the questioner to say, and the conditions that make those statements mandatory.
The three things that must be stated
Article 31(b) provides that no person subject to the code may interrogate, or request any statement from, an accused or a person suspected of an offense without first telling that person three things.
First, the questioner must inform the service member of the nature of the accusation. The person being questioned is entitled to know what offense he is suspected of having committed. A vague reference to an “incident” or an open-ended request to explain himself does not satisfy this requirement, because the protection is meaningless if the service member cannot connect the questions to the jeopardy he faces.
Second, the questioner must advise the service member that he does not have to make any statement regarding the offense. This is the right to remain silent, and under Article 31 it is unqualified. The service member is not required to give an account, justify his conduct, or “clear the air.”
Third, the questioner must advise that any statement made may be used as evidence against him in a trial by court-martial. This warns the service member of the consequence of speaking, so that any decision to talk is an informed one.
In practice, military rights advisements also include notice of the right to consult with and to be represented by counsel, a protection that flows from the broader body of military self-incrimination law and the Military Rules of Evidence. But the three statements above are the core of what Article 31(b) itself commands.
Who must give the warning
Article 31(b) applies to a person subject to the code who questions an accused or a suspect. This reaches far beyond uniformed criminal investigators. Commanders, first sergeants, supervisors, and other military personnel can all trigger the warning requirement when they question someone they suspect of an offense. That breadth is one of the key differences between Article 31 and Miranda, which generally applies only to custodial interrogation by law enforcement.
The warning is not required for every conversation, however. Courts ask whether the questioner was acting, or could reasonably be considered to be acting, in an official law-enforcement or disciplinary capacity. The Court of Appeals for the Armed Forces addressed this framework in United States v. Cohen, 63 M.J. 45 (C.A.A.F. 2006), assessing the totality of the circumstances at the time of the interview to decide whether the questioner stood in that official posture. Casual conversation, or questioning that serves a legitimate administrative or operational purpose unrelated to building a disciplinary case, may fall outside the rule.
When the warning is triggered
Two conditions matter. The person being questioned must be a suspect or an accused, not merely a witness, and the questions must concern the offense of which he is suspected. If a service member is genuinely only a witness, or the questions are unrelated to any suspected misconduct on his part, Article 31(b) warnings are not required. Once suspicion focuses on the person and the questioning turns to that suspected offense, the warning must come first.
Because the line between witness and suspect can shift mid-conversation, careful officials give the advisement as soon as suspicion attaches. A statement that begins as a witness account but turns incriminating can raise difficult admissibility questions if no warning was given when suspicion arose.
The consequence of failing to warn
The remedy for an Article 31(b) violation is exclusion. A statement obtained without the required advisement is generally inadmissible against the service member at court-martial under the Military Rules of Evidence governing confessions and admissions. That suppression can extend to evidence derived from the unwarned statement, depending on the circumstances. The exclusionary consequence is what gives the warning requirement its practical force, because it removes the incentive to cut corners during questioning.
Equally important, a service member’s decision to invoke the right to remain silent cannot be used against him. Silence in the face of questioning is not evidence of guilt and may not be argued or admitted as such.
How Article 31(b) differs from Miranda
Service members sometimes assume the military warning mirrors the familiar civilian one. It does not. Miranda attaches to custodial interrogation by law enforcement. Article 31(b) attaches whenever a person subject to the code questions a suspect about a suspected offense in an official capacity, with no custody requirement at all. A service member can be sitting in his own workspace, free to leave, and still be entitled to an Article 31(b) advisement before a supervisor questions him about suspected misconduct. This makes Article 31(b) one of the most protective self-incrimination rules in American law.
The bottom line
Before questioning a service member about a suspected offense, an official acting in a law-enforcement or disciplinary capacity must state the nature of the accusation, advise that the member need not make any statement about the offense, and advise that any statement may be used against him in a court-martial. Those three statements, given when the member is a suspect and the questions concern the suspected offense, are the heart of Article 31(b). Skipping them generally renders the resulting statement inadmissible.
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.
For these reasons, no reader should act or decline to act based on this content without first consulting a licensed attorney experienced in military justice about their own situation. The author and publisher make no warranty, express or implied, as to the accuracy, completeness, timeliness, or current applicability of the information provided, and disclaim any liability for any action taken or not taken in reliance on it. If you are facing investigation, charges, or an adverse administrative action, time limits may apply, and you should seek qualified counsel promptly.