Opening the Door Requires a Genuine Misleading Advantage: Rule 404(b) Evidence Cannot Retroactively Justify an Earlier Police Investigation

Case: State v. Trueman, 2026 N.H. 35

Court: Supreme Court of New Hampshire

Date: September 24, 2026

Disposition: Conviction reversed and case remanded for further proceedings.

Introduction

Richard Trueman was convicted of selling a controlled drug resulting in death under RSA 318-B:26, IX. The prosecution alleged that Trueman supplied fentanyl to the victim shortly before the victim inhaled the drug, overdosed, and later died from fentanyl toxicity.

The State’s proof was circumstantial. The victim repeatedly attempted to contact Trueman, offered “60 for a ticket,” traveled to an area near Trueman’s home, returned to his friend’s vehicle, inhaled a substance, and rapidly exhibited signs of an overdose. Police later found fentanyl in the victim’s wallet.

Before trial, the Superior Court excluded Facebook communications suggesting that Trueman had engaged in unrelated drug transactions. During trial, however, the court allowed a detective to describe those communications after concluding that the defense had “opened the door” by criticizing the thoroughness of the police investigation.

The appeal presented two principal questions: whether the specific contradiction branch of the opening-the-door doctrine permitted admission of the otherwise inadmissible Rule 404(b) evidence, and whether the remaining circumstantial evidence was sufficient to support the conviction.

Summary of the Opinion

The Supreme Court held that the trial court misapplied the specific contradiction doctrine. An accurate defense showing that police failed to take certain investigative steps did not create a misleading advantage. Moreover, the third-party Facebook communications were obtained more than two months after the victim’s death and therefore could not explain the police decision to focus on Trueman at the beginning of the investigation.

The court further determined that the error was not harmless beyond a reasonable doubt. Evidence portraying Trueman as a person who sold controlled drugs carried an acute risk that the jury would use it as propensity evidence—reasoning that because he sold drugs to others, he probably sold fentanyl to the victim.

Nevertheless, the court held that the properly considered evidence was legally sufficient to permit a rational jury to find guilt beyond a reasonable doubt. Because the evidence was sufficient, double jeopardy did not bar a retrial. The court therefore reversed the conviction and remanded rather than ordering an acquittal.

Analysis

1. Rule 404(b) and the danger of propensity reasoning

New Hampshire Rule of Evidence 404(b)(1) generally prohibits evidence of other crimes, wrongs, or acts when offered to show that a person has a particular character and acted consistently with that character. Such evidence may be admissible for another legitimate purpose, including motive, intent, knowledge, identity, plan, or absence of mistake.

The trial court initially recognized that the third-party Facebook communications had little probative value and posed an “extremely high” risk that the jury would convict Trueman because it believed he was generally a drug dealer. That pretrial exclusion was not itself challenged on appeal.

At trial, defense counsel accurately established that police did not search the driver’s vehicle, obtain his fingerprints, test the fentanyl bag for fingerprints or DNA, or photograph relevant evidence. The Supreme Court concluded that these accurate criticisms did not become misleading merely because they supported the defense theory of an incomplete investigation.

2. Limits of the specific contradiction doctrine

The opinion distinguishes two forms of the opening-the-door doctrine:

  • Curative admissibility: One party introduces inadmissible and prejudicial evidence, permitting the opponent to introduce otherwise inadmissible evidence necessary to counter the prejudice.
  • Specific contradiction: One party introduces admissible evidence that creates a misleading advantage, permitting the opponent to use otherwise inadmissible evidence to correct that false or distorted impression.

Neither doctrine permits wholesale admission of prejudicial evidence. Both are remedial and must remain confined to what is necessary to remove the unfair or misleading effect.

The Supreme Court identified three defects in the trial court’s ruling:

  1. No misleading advantage existed. The defense accurately described investigative steps that police did not take. Truthful evidence of omissions in an investigation does not, without more, create the misleading impression required by specific contradiction.
  2. The evidence could not explain the early investigation. Police did not obtain the third-party Facebook records until December 14, 2020, more than two months after the victim’s death. Those records therefore could not have influenced the initial decision to focus on Trueman rather than the driver.
  3. Admissible evidence was available. Police had obtained the victim’s communications with Trueman on September 30, 2020. Those communications could explain why investigators focused on Trueman without introducing evidence of unrelated drug transactions.

The resulting rule is significant: specific contradiction does not allow the prosecution to introduce propensity-laden evidence merely because the defense has accurately criticized an investigation. The proposed rebuttal must actually correct a misleading impression and must have a logical and temporal relationship to the matter being rebutted.

3. Harmless-error analysis

Once error was established, the State had to prove beyond a reasonable doubt that the improper evidence did not affect the verdict. The court examined the totality of the trial circumstances, including the strength of the State’s case, the prejudicial nature and frequency of the evidence, the defense theory, the use of the evidence in closing argument, and the effectiveness of the limiting instruction.

The error was not harmless because the case linking Trueman to the fentanyl was entirely circumstantial. Without the disputed evidence, the jury heard that the victim urgently contacted Trueman, met him or went near his home, and then overdosed. With the disputed evidence, the State’s theory became more powerful and more prejudicial: the victim urgently contacted someone who was portrayed as a drug dealer, met him, and immediately overdosed.

The detective referred to the third-party drug communications twice, and the prosecutor relied on them during closing argument as proof that police had conducted a thorough investigation and appropriately ruled out the driver.

The limiting instruction did not cure the error. It told the jury not to infer that Trueman engaged in unrelated drug transactions while simultaneously permitting the evidence to justify why police treated him as the primary suspect. The court considered that rationale internally inconsistent: the evidence could justify the focus on Trueman only if the jury accepted that it showed his involvement in other drug transactions.

4. Sufficiency of the circumstantial evidence

Harmless-error review and sufficiency review employ different perspectives. Harmless-error review asks whether the State proved beyond a reasonable doubt that the error did not affect the verdict and considers the totality of the trial circumstances without viewing everything in the State’s favor. Sufficiency review, by contrast, views the evidence and reasonable inferences in the light most favorable to the State.

Because the evidence that Trueman supplied the fentanyl was entirely circumstantial, he was required to show that it failed to exclude every reasonable conclusion other than guilt. The standard does not require exclusion of every conceivable innocent possibility.

The evidence permitted a rational jury to find that:

  • The victim used illegal drugs.
  • He attempted to contact Trueman dozens of times within approximately seventy minutes.
  • He offered Trueman “60 for a ticket,” reasonably understood in context as a proposed purchase.
  • He traveled to a location one block from Trueman’s home and returned about twenty minutes later.
  • He inhaled a substance shortly after returning to the vehicle and rapidly showed signs of an overdose.
  • Police found fentanyl in his wallet.
  • He died from fentanyl toxicity.

Taken together and viewed favorably to the prosecution, those circumstances allowed a rational jury to conclude beyond a reasonable doubt that Trueman supplied the fentanyl. The theoretical possibility that another person supplied it did not constitute a sufficiently reasonable alternative hypothesis requiring acquittal.

5. Precedents Cited

Precedent Role in the Court’s Reasoning
State v. Rouleau Established that Rule 404(b) protects defendants from conviction based on unrelated misconduct rather than the charged offense. It also supplied the totality-of-the-circumstances factors governing harmless-error review.
State v. Roman Defined curative admissibility and specific contradiction, emphasized that a misleading advantage is required for the latter, and explained that opening the door does not authorize unlimited admission of prejudicial evidence.
State v. Trempe Supported the conclusion that inadmissible Rule 404(b) evidence should not be admitted when other admissible testimony can correct the alleged misleading impression.
State v. Morrill Reinforced that otherwise inadmissible evidence is unnecessary when admissible evidence already places an allegedly misleading matter in its proper context.
State v. Smith Characterized harmless Rule 404(b) errors as rare, reflecting the substantial danger that evidence of unrelated misconduct will influence a jury’s determination of guilt.
State v. Woodbury Supported the court’s concern that an evidentiary error is less likely to be harmless when the remaining proof is circumstantial rather than overwhelming.
State v. Pelkey Recognized the extreme prejudicial effect of evidence portraying a defendant as a drug dealer and the limits of jury instructions in removing that prejudice.
State v. Montgomery Confirmed that limiting instructions cannot always prevent a jury from drawing a forbidden propensity inference from other-acts evidence.
State v. LaBranche Emphasized that the State should not benefit from evidence that jurors were legally forbidden to consider but could not realistically put out of their minds.
State v. Ojo Established that if the evidence were legally insufficient, the State Constitution’s protection against double jeopardy would prohibit a second trial.
Burks v. United States Supplied the parallel federal rule that reversal for evidentiary insufficiency requires acquittal and bars retrial, unlike reversal for trial error.
State v. Seibel Provided the governing sufficiency standard, including review in the light most favorable to the State and the requirement that wholly circumstantial proof exclude all reasonable conclusions other than guilt.

Complex Concepts Simplified

Propensity evidence

Propensity evidence asks the jury to reason that because a defendant committed other wrongful acts, the defendant probably committed the charged crime. Rule 404(b) generally prohibits that reasoning.

Opening the door

A party may sometimes make otherwise inadmissible evidence relevant by creating an unfair or misleading impression. But an accurate criticism does not open the door merely because it is damaging to the opposing party.

Unsustainable exercise of discretion

This is New Hampshire’s standard for reviewing many evidentiary rulings. Reversal is appropriate when the trial court’s decision is clearly unreasonable or untenable and prejudices the defendant.

Harmless beyond a reasonable doubt

Even when a trial court makes an error, a conviction may stand if the State proves beyond a reasonable doubt that the error did not affect the verdict. The State failed to meet that burden here.

Circumstantial evidence

Circumstantial evidence proves a fact through inference rather than direct observation. It can support a conviction, but when it is the only proof of an element, the combined circumstances must exclude all reasonable conclusions other than guilt.

Reversal and remand versus acquittal

Reversal for trial error generally permits a retrial. Reversal for legally insufficient evidence requires an acquittal and bars retrial. Trueman’s case was remanded because the trial was tainted by evidentiary error, but the evidence was sufficient.

Impact

The opinion places a meaningful restriction on prosecutorial reliance on the opening-the-door doctrine. Future courts must identify an actual misleading advantage, not merely a defense argument that casts the investigation in a negative light. They must also determine whether the proposed rebuttal truly addresses that impression and whether less prejudicial admissible evidence is available.

The temporal analysis is particularly important. Evidence discovered after an investigative decision generally cannot justify that earlier decision. Prosecutors therefore may not use later-discovered misconduct to retroactively validate police choices made before the misconduct was known.

The decision also warns that evidence identifying a defendant as a drug dealer is exceptionally prejudicial in a drug-distribution prosecution. A limiting instruction may be inadequate where the permissible and forbidden uses of the evidence are practically inseparable.

Finally, the opinion clarifies why a court may find evidence strong enough to permit retrial yet not strong enough to render an evidentiary error harmless. Sufficiency asks whether a rational jury could convict; harmless error asks whether the reviewing court can be certain beyond a reasonable doubt that the error did not influence the actual verdict.

Conclusion

State v. Trueman establishes that an accurate challenge to the completeness of a police investigation does not, by itself, open the door to highly prejudicial evidence of unrelated misconduct. Specific contradiction requires a genuinely misleading advantage, and the rebuttal evidence must logically correct that advantage rather than invite forbidden propensity reasoning.

Because the improperly admitted drug-transaction evidence may have materially influenced a verdict resting on circumstantial proof, the error was not harmless. Yet the circumstantial evidence was legally sufficient, allowing the State to retry Trueman on remand.