Noncommissioned officers are often the first to look into a problem when something goes wrong in a unit. A squad leader or platoon sergeant may be told to find out what happened, talk to the people involved, and report back. That kind of preliminary inquiry can put an NCO in the position of asking questions that produce incriminating answers. The question is whether an NCO in that role can violate Article 31 of the Uniform Code of Military Justice. The answer is yes. Article 31 is not limited to law enforcement agents, and an NCO who questions a suspect without the required warning, while acting in a disciplinary or investigative capacity, can render the resulting statement inadmissible.
What Article 31 requires
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 that person of the nature of the accusation, advising that the person does not have to make any statement, and warning that any statement may be used as evidence in a trial by court-martial. Article 31(d) bars the use in evidence of any statement obtained in violation of the article.
The text is broad. It applies to any person subject to the UCMJ, which plainly includes noncommissioned officers. There is no exemption for low-level inquiries or for questioning done by someone who is not a trained investigator. What matters is the nature of the questioning, not the rank or title of the questioner.
Not every question triggers the warning
Even though Article 31 reaches NCOs, it does not require a warning before every conversation. Courts have narrowed the rule so that it applies when the warning serves the purpose Congress intended, which is to protect against the subtle pressure a service member feels when questioned by someone acting on behalf of the military’s disciplinary or law enforcement machinery.
The Court of Appeals for the Armed Forces has framed this as a two-part inquiry. A warning is required when the questioner is acting in an official law enforcement or disciplinary capacity, or could reasonably be considered to be acting in such a capacity, and when the questioning is more than a casual conversation. This framework appears in decisions such as United States v. Cohen, 63 M.J. 45 (C.A.A.F. 2006), and United States v. Jones, 73 M.J. 357 (C.A.A.F. 2014). The court looks at the totality of the circumstances at the time of the questioning to decide whether the person being questioned would perceive the inquiry as official.
Why an NCO’s inquiry often crosses the line
For an NCO conducting a preliminary inquiry, both parts of the test are frequently met. When a senior enlisted leader is directed to investigate possible misconduct and questions a subordinate suspected of that misconduct, the NCO is acting in a disciplinary or investigative capacity. The leader is gathering facts about a suspected offense for the chain of command, which is exactly the kind of official function the warning requirement targets.
The military justice system also recognizes the reality of rank and authority. Questioning by a military superior in the immediate chain of command is normally presumed to be for disciplinary purposes, although that presumption is not conclusive and can be rebutted by the circumstances. A subordinate questioned by a superior about suspected wrongdoing feels pressure to answer that a civilian questioned by a stranger does not. Article 31 exists precisely because of that pressure. So when an NCO who is tasked with looking into misconduct sits down a suspected subordinate and asks what happened, the law generally expects a rights advisement first.
When a warning may not be required
There are situations where an NCO can ask questions without triggering Article 31. If the NCO is genuinely engaged in a casual, personal conversation rather than an official inquiry, or is asking questions for administrative or operational reasons unrelated to a suspected offense, the protective purpose of the warning may not be implicated. Spontaneous statements that a service member volunteers without being interrogated or asked for a statement are also outside the rule, because Article 31 is triggered by interrogation or a request for a statement, not by unsolicited remarks.
The critical variables are whether the NCO already suspects the person of an offense and whether the questioning is part of an official effort to develop information about that offense. Once suspicion exists and the NCO is functioning in a disciplinary or investigative role, the conversation is no longer casual, and the warning requirement attaches.
The consequence of getting it wrong
If an NCO questions a suspect in a disciplinary capacity without the required advisement, the statement is obtained in violation of Article 31 and is subject to suppression. Under the confessions framework, a statement obtained in violation of Article 31 is treated as involuntary and excluded if the defense makes a timely motion. The government bears the burden of establishing admissibility, and it cannot meet that burden when a required warning was skipped.
The practical effect can be significant. A unit-level inquiry that produces an incriminating admission may seem like solid evidence, but if the NCO failed to advise the suspect, that admission can be thrown out before trial. Statements derived from the tainted statement may also be challenged. In some circumstances an improperly obtained statement may be used only for narrow purposes, such as impeachment, rather than as substantive evidence of guilt.
Practical guidance
For NCOs, the safest course when a preliminary inquiry turns toward a suspected offense is to provide the Article 31 warning before asking the suspect questions, or to stop and refer the matter to law enforcement or the chain of command rather than press for a statement. For service members who are questioned, the key insight is that the protection does not depend on who is asking. A statement squeezed out by a squad leader or first sergeant without a proper advisement is just as suppressible as one taken by an investigator.
Because the analysis turns on the specific facts, such as whether the NCO already suspected the service member, the setting, and the way the questions were posed, anyone who gave a statement during a unit-level inquiry should have qualified defense counsel evaluate whether Article 31 was violated and whether the statement can be excluded.
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.