Service members tend to associate Article 31 warnings with criminal investigators and military police. But the protection reaches further than the law enforcement community. Instructors, drill leaders, and senior noncommissioned officers occupy positions of authority that can carry the same coercive pressure the law was designed to guard against. The question of whether these figures can trigger Article 31 violations is a real and frequently litigated one, and the answer is yes, they can, depending on the role they are playing and what they know.
The Purpose Behind Article 31
Article 31 of the Uniform Code of Military Justice, codified at 10 U.S.C. 831, requires that before a person subject to the code interrogates or requests a statement from someone accused or suspected of an offense, the questioner must inform that person of the nature of the accusation, the right to remain silent, and that any statement may be used against them in a court-martial. The provision exists because the military environment is built on obedience to authority. When a superior asks a question, a subordinate may feel a strong, almost reflexive pull to answer. Article 31 addresses precisely this subtle pressure that flows from rank and position, which is why it does not depend on whether the service member is in custody.
The Test Applies to Authority, Not Just Investigators
Modern military case law frames the warning requirement around two objective questions. First, was the person being questioned a suspect at the time, judged by whether the questioner believed or reasonably should have believed that the service member committed an offense. Second, was the questioning conducted as part of an official law enforcement or disciplinary investigation or inquiry, judged by whether the questioner was acting, or could reasonably be considered to be acting, in an official disciplinary or law enforcement capacity. The Court of Appeals for the Armed Forces articulated this framework in United States v. Swift, refining the earlier approach from United States v. Duga that had asked whether the questioner acted in an official capacity and whether the person questioned perceived the inquiry as more than casual conversation.
Nothing in this test limits it to investigators. The decisive factors are the questioner’s role and knowledge, not the questioner’s job title. An instructor or a senior NCO who questions a suspected subordinate about misconduct can readily satisfy both prongs.
The Disciplinary Presumption and the Chain of Command
A …