Character evidence can be valuable to the defense in a court-martial, but it is also among the most tightly regulated categories of proof. The Military Rules of Evidence limit when character evidence is admissible, what kind may be offered, how it must be presented, and what notice or procedure applies. Counsel who want to keep character evidence from being excluded must work within those rules from the start. This article explains the steps that protect character evidence in a court-martial and the common mistakes that cause it to be kept out.
Understand the basic prohibition and its exceptions
The starting point is Military Rule of Evidence 404. As a general matter, evidence of a person’s character or a particular character trait is not admissible to prove that the person acted in conformity with that character on a particular occasion. This propensity bar is the default. The path to admissibility runs through the specific exceptions the rules allow, so the first step is to identify the exception that applies rather than assuming character evidence comes in freely.
One recognized avenue is pertinent trait evidence offered by the accused. An accused may offer evidence of a pertinent character trait, meaning a trait that actually relates to the offense charged. The classic illustration is that an accused charged with a violent offense may offer evidence of a peaceful or non violent character, because that trait bears on the likelihood of the charged conduct. The trait must be genuinely pertinent to the offense, which is why counsel must match the trait to the elements at issue.
Know the limits on good military character
A frequent pitfall involves general good military character. The rules restrict the use of general military character evidence, and that restriction reaches the serious offenses most likely to be litigated at general courts-martial. General military character is not admissible to show that the accused did not commit offenses such as those under Article 120 and a range of other listed articles, or any offense for which the trait is not relevant to an element. The reasoning is that being a good service member does not make it less likely that a person committed, for example, a sexual offense, because good duty performance is not pertinent to that question. By contrast, for certain offenses where the trait does bear on an element, such as some duty related or military specific misconduct, good military character may remain relevant. The step here is to avoid offering general good soldier evidence where the rules bar it and to confine character evidence to traits that are actually pertinent to the charged offense.
Use the correct method of proof under Rule 405
Even admissible character evidence can be excluded if it is presented in the wrong form. Military Rule of Evidence 405 governs the methods of proving character. When character evidence is admissible, it ordinarily may be proved by testimony about the person’s reputation or by testimony in the form of an opinion. Proof by specific instances of conduct is more limited and is generally reserved for situations where character or a trait is an essential element of the charge or defense, or on cross examination in the manner the rule allows. A common error is trying to prove good character by piling up specific good deeds when only reputation or opinion testimony is permitted. Counsel should prepare character witnesses to testify in the proper form, laying a foundation that the witness knows the accused’s reputation in the relevant community or has a basis for an opinion about the pertinent trait.
Lay the proper foundation
Foundation is essential. A reputation witness must show familiarity with the accused’s reputation within a recognized community, such as the unit or workplace. An opinion witness must show a sufficient basis of personal knowledge to hold the opinion offered. Without that foundation, the testimony is vulnerable to exclusion regardless of how favorable it would be. Preparing witnesses to establish how they know the accused, for how long, and in what setting protects the evidence from a foundational objection.
Anticipate notice and procedural requirements
Some categories of character related evidence carry notice obligations, and missing them can lead to exclusion. The most prominent example is evidence of other crimes, wrongs, or acts under Rule 404(b), which may be admissible for non propensity purposes such as proving motive, opportunity, intent, plan, knowledge, identity, or absence of mistake. When the prosecution intends to offer such evidence, the rule requires that it provide notice to the defense. Although that notice rule binds the government, defense counsel must understand it in order to demand proper notice and to litigate the admissibility of such evidence. More broadly, counsel on both sides should know which character related theories trigger procedural steps and comply with them, because a failure of required notice or procedure is a recognized basis for keeping evidence out.
Be ready for the consequences of opening the door
Offering character evidence has a cost. When the accused introduces evidence of a pertinent good trait, the prosecution may respond, including by cross examining the character witness about relevant specific instances of conduct and, in appropriate circumstances, by offering rebuttal character evidence. Counsel must weigh this exposure before opening the door, because the same step that admits favorable character evidence can also let in damaging material that would otherwise have stayed out. Preventing exclusion is only worthwhile if the evidence, once admitted, helps more than it hurts.
Tie everything to relevance
Finally, character evidence must clear the general relevance requirements, and it remains subject to exclusion where its probative value is substantially outweighed by the danger of unfair prejudice, confusion, or waste of time. The most reliable way to keep character evidence in is to show the court precisely why the trait matters to a question the factfinder must decide. Evidence that is plainly pertinent, properly formed, and well founded is far harder to exclude than evidence offered as a general appeal to the accused’s good qualities.
Conclusion
To prevent character evidence from being excluded at a court-martial, counsel must work deliberately within Military Rules of Evidence 404 and 405. That means identifying a recognized exception to the propensity bar, offering only traits that are genuinely pertinent to the charged offense, avoiding general good military character where the rules forbid it, presenting the evidence through the correct method of reputation or opinion testimony, laying a solid foundation, complying with any applicable notice and procedural requirements, and confirming that the evidence is relevant and not unfairly prejudicial. Counsel must also weigh the risk of opening the door to damaging rebuttal. Character evidence that is matched to the offense, properly formed, and well founded stands the best chance of being heard by the factfinder rather than 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.