Commanders routinely order fact-finding inquiries when something goes wrong in a unit. In the Army these are often conducted under AR 15-6; the other services have their equivalents, such as command-directed investigations. These inquiries produce reports, findings, and witness statements. When the same conduct later leads to a court-martial, the government may want to use the investigation as evidence. But a command investigation is built for administrative fact-finding, not for criminal prosecution, and several rules sharply limit how much of it can come into a court-martial. Knowing those limits is essential, because much of what an administrative inquiry gathers is inadmissible at trial.
Two different worlds: administrative inquiry versus criminal trial
The first thing to understand is the gap in purpose and procedure. A command investigation is a flexible, informal tool. The investigating officer can rely on hearsay, opinions, and informal interviews, and the standard for findings is far lower than the criminal burden of proof. A court-martial, by contrast, applies the Military Rules of Evidence (MRE) and requires proof beyond a reasonable doubt. Evidence that is perfectly acceptable in the administrative report frequently cannot satisfy the MRE. So the investigation that justified an administrative action does not automatically translate into admissible trial evidence.
The hearsay barrier and the public-records exclusion
The single biggest restriction is hearsay. A command investigation report is, at bottom, a collection of out-of-court statements and the investigating officer’s conclusions. Offered for the truth of what it asserts, the report is hearsay and is inadmissible under MRE 802 unless an exception applies.
The natural candidates are the records exceptions, but they fit poorly. MRE 803(6), the business-records exception, and MRE 803(8), the public-records exception, both require foundational reliability and were not designed to admit an adversarial fact-finding report wholesale. More pointedly, MRE 803(8) excludes, in a criminal case, matters observed by law-enforcement personnel and investigative findings of that kind, reflecting a judgment that prosecution-oriented investigative conclusions should not be admitted against an accused through a records exception. Courts also resist letting the government evade that exclusion by relabeling the same material as a business record under MRE 803(6). The practical result is that the report’s findings and conclusions usually cannot be admitted for their truth.
What this means at trial is that the government generally must prove its case through live witnesses, not by handing the panel the investigation. The witnesses interviewed during the inquiry can be called to testify, subject to cross-examination, but their earlier statements in the report do not come in simply because they appear there.
Statements, rights warnings, and voluntariness
A second cluster of restrictions concerns how statements were obtained. When an investigation shifts from general fact-finding toward suspecting a particular member of an offense, that member is entitled to rights warnings under Article 31 of the Uniform Code of Military Justice before being questioned about the suspected offense. A statement taken from a suspect without the required Article 31 warning, or one that was not voluntary, can be suppressed under the MRE governing confessions and admissions. This is a frequent battleground, because command investigators are not always alert to the moment an inquiry crosses from administrative to accusatory, and statements taken on the wrong side of that line may be inadmissible against the person who made them.
The accused’s own statements versus everyone else’s
Not all of the report is equally vulnerable. The accused’s own statements in the investigation, if properly obtained, are admissible against the accused as statements of a party-opponent under MRE 801(d)(2) and are not hearsay. So a voluntary, properly warned admission the accused made to the investigating officer can be used. By contrast, statements by third parties in the report remain hearsay as to the accused and need their own basis for admission, which usually means calling those people to testify rather than reading their statements from the report.
Relevance, character, and balancing
Even admissible pieces of an investigation must clear the ordinary evidentiary gates. The material must be relevant under MRE 401. If it is offered to suggest the accused has a bad character and acted in conformity with it, MRE 404 bars that use, though specific portions might be admissible for a proper non-character purpose. And all of it is subject to MRE 403, which lets the military judge exclude evidence whose probative value is substantially outweighed by unfair prejudice or confusion. An investigative report’s findings can be especially prejudicial because they carry an aura of official conclusion, which is one more reason judges are cautious about admitting them.
Use for other purposes
The restrictions above concern using the investigation as substantive proof of guilt. Portions of an investigation may still have limited uses, such as impeaching a witness whose trial testimony differs from an earlier statement, refreshing a witness’s recollection, or providing leads the government independently develops into admissible evidence. These uses do not put the report itself before the panel as proof of the matters asserted, and they remain subject to the applicable rules.
Putting it together
The restrictions on using command investigations as evidence at court-martial are substantial. Because the inquiry is an informal administrative tool while the trial follows the Military Rules of Evidence, the investigation’s findings and conclusions generally cannot be admitted for their truth, blocked by the hearsay rule and by the MRE 803(8) exclusion of investigative and law-enforcement matters, which the government cannot sidestep through the business-records exception. Statements gathered during the inquiry may be suppressed if taken without required Article 31 warnings or if involuntary. The accused’s own properly obtained statements can be used as party-opponent admissions, but third-party statements ordinarily require live testimony. Everything that does come in must still satisfy relevance, character-evidence, and MRE 403 balancing rules. In practice, a command investigation usually serves as a roadmap for the prosecution rather than as evidence itself, and the government must rebuild its case at trial through admissible testimony and exhibits.
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.