M.R.E. 413 and 414: Propensity Evidence in Sexual Offense Cases
Key takeaways
- In sexual offense and child molestation courts-martial, evidence of the accused’s other such offenses is admissible and “may be considered on any matter to which it is relevant” — including propensity. M.R.E. 413(a), 414(a).
- M.R.E. 403 balancing is mandatory before admission, guided by the nonexclusive Wright factors. United States v. Wright, 53 M.J. 476 (C.A.A.F. 2000); United States v. Green, 51 M.J. 835 (Army Ct. Crim. App. 1999).
- United States v. Hills, 75 M.J. 350 (C.A.A.F. 2016): using evidence of one charged offense as propensity evidence for another charged offense is unconstitutional — it undermines the presumption of innocence and dilutes the burden of proof.
- United States v. Hukill, 76 M.J. 219 (C.A.A.F. 2017): the Hills rule applies regardless of the forum, the number of victims, or whether the events are connected.
- The prosecution must disclose 413/414 evidence — including witness statements or a summary of expected testimony — at least five days before entry of pleas.
The propensity exception
The general rule of the Military Rules of Evidence is that propensity evidence is forbidden. M.R.E. 413 and 414 are Congress’s deliberate exceptions, enacted as part of the Violent Crime Control and Law Enforcement Act of 1994 with the stated intent — voiced by the rules’ primary sponsor — that courts “liberally construe” them so factfinders can assess a defendant’s criminal propensities in light of past conduct.
In a court-martial proceeding for a sexual offense, the military judge may admit evidence that the accused committed any other sexual offense. The evidence may be considered on any matter to which it is relevant.
M.R.E. 413(a)
M.R.E. 414 does the same work for child molestation cases. The rules were written to overcome three limits of M.R.E. 404(b): the requirement to articulate a non-propensity purpose, the judge’s 403 discretion to exclude, and the limiting instruction barring propensity argument. Under 413/414, the government may argue propensity outright — and may prove the other offense by reputation, opinion, or specific acts, since these rules are exempt from M.R.E. 405’s form limits. The definitions are broad but bounded: “sexual offense” reaches Article 120 conduct, federal offenses under 18 U.S.C. chapter 109A, and specified nonconsensual contact; “child molestation” covers listed conduct with a child under 16. The boundaries matter — mere file names suggestive of child pornography were not evidence of a qualifying offense, United States v. Yammine, 69 M.J. 70 (C.A.A.F. 2010), while an image of a child in obvious pain, saved and viewed for gratification, qualified. United States v. Conrady, 69 M.J. 714 (Army Ct. Crim. App. 2011).
Threshold findings and disclosure
Before admitting 413/414 evidence, the military judge must make three threshold determinations, United States v. Berry, 61 M.J. 91 (C.A.A.F. 2005):
- the accused is charged with an offense of sexual assault or child molestation;
- the proffered evidence is evidence of the accused’s commission of another offense of sexual assault or child molestation as the rules define those terms; and
- the evidence is relevant under M.R.E. 401 and 402.
Two doctrines widen the funnel. There is no temporal limit — other offenses occurring after the charged offenses are admissible. United States v. James, 63 M.J. 217 (C.A.A.F. 2006). And the other acts need not mirror the charged acts. United States v. Ediger, 68 M.J. 243 (C.A.A.F. 2010). Procedurally, the prosecution must disclose the evidence to the accused — including witness statements or a summary of expected testimony — at least five days before entry of pleas, or later only with the judge’s leave for good cause.
The Wright factors
Clearing the threshold is not admission. The judge must then conduct M.R.E. 403 balancing — a step the government sometimes argues the rules “trump,” and courts have squarely rejected. United States v. Green, 51 M.J. 835 (Army Ct. Crim. App. 1999). In United States v. Wright, 53 M.J. 476, 482 (C.A.A.F. 2000), the CAAF upheld the rule’s constitutionality precisely because 403 balancing safeguards the accused — and it listed the nonexclusive factors a military judge must weigh:
| Wright factor | What the defense argues |
|---|---|
| Strength of proof of the prior act | A conviction is strong; “mere gossip,” a recanted report, or an uncharged allegation is weak |
| Probative weight of the evidence | How much the prior act actually says about the charged one |
| Potential for less prejudicial evidence | Can the point be made without the inflammatory version? |
| Distraction of the factfinder | A trial-within-a-trial over the uncharged event |
| Time needed to prove the prior conduct | Witnesses, exhibits, and days added |
| Temporal proximity | Decade-old acts carry less weight |
| Frequency of the acts | An isolated incident is not a pattern |
| Intervening circumstances | Years of clean service, changed life circumstances |
| Relationship between the parties | Different relationships undercut the comparison |
The balancing has teeth. In Berry, the CAAF held an eight-year-old incident from the accused’s adolescence inadmissible under a proper 403 analysis. In United States v. Bare, 65 M.J. 35 (C.A.A.F. 2007), by contrast, adolescent acts survived — because the judge conducted a meaningful analysis, the misconduct continued into adulthood, and it recurred for years. The court’s caution stands either way: judges must meaningfully analyze the accused’s phases of development before projecting an adult’s mens rea onto a child’s acts. A judge need not mechanically recite every factor, United States v. Bailey, 55 M.J. 238 (C.A.A.F. 2001), but a missing or conclusory balancing is reversible error.
Hills and Hukill: charged offenses are different
For years, the government used 413 to argue propensity between charged offenses — telling the panel that if it believed victim A, that made the allegation of victim B more likely, and vice versa. The CAAF ended that in United States v. Hills, 75 M.J. 350 (C.A.A.F. 2016): using evidence of a charged offense as M.R.E. 413 propensity evidence for another charged offense is unconstitutional, because it undermines the presumption of innocence and dilutes the government’s burden of proving each charged offense beyond a reasonable doubt. Each specification must stand on its own proof; conduct the accused is presumed innocent of cannot double as evidence of his propensity to commit the offense next to it on the charge sheet.
United States v. Hukill, 76 M.J. 219 (C.A.A.F. 2017), closed the loopholes: the use of charged conduct as M.R.E. 413 evidence is error regardless of the forum, the number of victims, or whether the events are connected — judge-alone trials included. The pair of holdings reshaped multi-victim military sexual assault prosecutions: properly admitted uncharged offenses may still prove propensity, but charged offenses may not bootstrap one another, and instructions or arguments inviting that inference are constitutional error tested under the demanding harmless-beyond-a-reasonable-doubt standard.
What this means if you face multiple allegations
Prosecutors charge multiple incidents together for a reason: the accumulation itself persuades. After Hills and Hukill, the law forbids the panel from using one charged allegation to prop up another — but that protection is only real if your lawyer polices the instructions, the trial counsel’s argument, and any government motion to treat charged conduct as propensity evidence. Severance motions, instruction objections, and a clean record are what preserve these issues. If you are facing stacked Article 120 specifications, get counsel who knows this line of cases into the fight now.
Panel instructions
When 413/414 evidence is properly admitted, the instruction is the last line of defense. The Army court in United States v. Dacosta, 63 M.J. 575 (Army Ct. Crim. App. 2006), imposed a sua sponte duty to give a specific list of instructions, later folded into the Benchbook. The CAAF’s decision in United States v. Schroder, 65 M.J. 49 (C.A.A.F. 2007), shows why: an instruction letting members consider the “similarities in the testimony” of victims was “susceptible to unconstitutional interpretation” because similarity alone could seem to convict. In 2016, ACCA retired Dacosta‘s formula but kept its core: the instruction must still inform the panel that “an accused may not be convicted based on propensity evidence alone” and that 413/414 evidence “does not relieve the government of its burden to prove every element of every offense charged.” United States v. Williams, 75 M.J. 621, 630 (Army Ct. Crim. App. 2016). Our guide to findings and instructions covers how these instructions are drafted, objected to, and preserved.
Defense litigation strategy
A 413/414 defense runs on four tracks. Track one: disqualify the evidence at the threshold. Does the proffered act actually meet the rule’s definition of a sexual offense or child molestation? Yammine says definitions are enforced literally. Track two: win the 403 balance. Brief the Wright factors with specifics — the staleness, the weakness of proof, the dissimilar relationship — and demand findings; Berry proves a proper balancing can exclude. Track three: police Hills/Hukill. Object to any instruction, argument, or ruling that lets charged offenses cross-pollinate, in any forum. Track four: contain the damage. If evidence comes in, litigate the instruction under Williams, attack the underlying allegation on the merits — the panel must still find the prior act happened — and remember that admissibility of the accused’s other acts under these rules is a different question from the shield protecting the complaining witness under M.R.E. 412; the two rules are litigated in the same motions season and often at the same closed hearings. Where consent or mistake of fact is the defense, coordinate this fight with the framework in our consent and mistake-of-fact guide.
Practitioner’s note
In our practice, the most dangerous 413 evidence is rarely the oldest allegation — it is the marginal one the government slips in to make the charged case feel inevitable. We litigate these motions with a full evidentiary attack on the prior act itself: interviewing its witnesses, pulling its investigative file, and showing the judge that “strength of proof,” the first Wright factor, is a rope of sand. And in every multi-specification case we chart, instruction by instruction and argument line by argument line, where the government invites the panel to do what Hills forbids — because that objection, made precisely and on the record, has become one of the most consequential in modern military appellate practice.
Frequently asked questions
What do M.R.E. 413 and 414 allow?
In a court-martial for a sexual offense, M.R.E. 413 allows evidence that the accused committed other sexual offenses, and M.R.E. 414 does the same for child molestation cases. Unlike ordinary character evidence, this evidence may be considered on any matter to which it is relevant — including the accused's propensity to commit such offenses — after the military judge makes threshold findings and conducts M.R.E. 403 balancing.
What are the Wright factors?
The nonexclusive considerations from United States v. Wright, 53 M.J. 476 (C.A.A.F. 2000), that a military judge must weigh before admitting 413 or 414 evidence: strength of proof of the prior act, probative weight, potential for less prejudicial evidence, distraction of the factfinder, time needed for proof, temporal proximity, frequency of the acts, intervening circumstances, and the relationship between the parties.
Can charged offenses be used as propensity evidence against each other?
No. Under United States v. Hills, using evidence of one charged offense as M.R.E. 413 propensity evidence for another charged offense is unconstitutional because it undermines the presumption of innocence and dilutes the government's burden of proof. United States v. Hukill confirmed the rule applies regardless of the forum, the number of victims, or whether the events are connected.
Does a prior sexual offense have to be a conviction to be admissible?
No. The rules reach any qualifying offense the judge finds the members could reasonably conclude occurred, whether or not it was charged or convicted. But the strength of proof is the first Wright factor — a conviction weighs heavily, while an uncorroborated or stale allegation is exactly the kind of evidence a proper M.R.E. 403 balancing can exclude.
What instructions must the panel receive about propensity evidence?
At minimum, that the accused may not be convicted on propensity evidence alone, and that 413 or 414 evidence does not relieve the government of its burden to prove every element of every charged offense beyond a reasonable doubt. An instruction suggesting that similarities among allegations can themselves convict is susceptible to unconstitutional interpretation.
How long before trial must the government disclose 413 or 414 evidence?
At least five days before entry of pleas, including witnesses' statements or a summary of the expected testimony. The military judge may allow later disclosure only for good cause. Early disclosure exists so the defense can investigate the prior allegation and litigate admissibility in pretrial motions rather than mid-trial.
About the attorneys behind this guide
Michael Waddington, Civilian Military Defense Lawyer
Michael Waddington, who reviewed this page, has defended Article 120 and child offense courts-martial for more than 25 years, including multi-victim prosecutions where the propensity motion decided the case before opening statements. A former Army prosecutor and defense counsel and a nationally known cross-examination instructor, he attacks the prior allegation itself — its witnesses, its file, its gaps — because a Wright-factor argument lands hardest when the judge sees how weak the proof behind the propensity theory really is.
Alexandra González-Waddington, Founding Partner
Alexandra González-Waddington, founding partner of Gonzalez & Waddington and the author of this deep dive, has spent over 20 years defending military sexual assault and child molestation allegations where M.R.E. 413 and 414 were the government’s sharpest weapon. She has litigated propensity motions and the instructions that follow them through the Hills and Hukill era, and she builds appellate-ready records — objection by objection — in stacked-specification cases where the constitutional line those decisions drew is most often crossed.
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Gonzalez & Waddington defends Soldiers, Sailors, Airmen, Marines, Guardians, and Coast Guardsmen worldwide — in UCMJ investigations, courts-martial, Article 15/NJP actions, GOMOR rebuttals, administrative separation boards, and Boards of Inquiry. We defend the whole case: the investigation, the trial, the administrative fallout, and the long-term consequences to your rank, retirement, clearance, and discharge.
Sources for this guide include the Uniform Code of Military Justice, the Manual for Courts-Martial (2024 ed.), the Rules for Courts-Martial, the TJAGLCS Criminal Law Deskbook, and the cited decisions of the Court of Appeals for the Armed Forces and the service Courts of Criminal Appeals. It is attorney advertising and general legal information — not legal advice, and reading it does not create an attorney–client relationship. Every case turns on its own facts. Service procedures vary; Army references (AR 27-10) are noted where used.