Treatment-Motive Foundations for Child Medical-Hearsay and Limits on Case-Specific “Credibility by Inflection” Expert Testimony

1. Introduction

In State of New Hampshire v. Madison T. West (N.H. Aug. 18, 2026), the New Hampshire Supreme Court affirmed convictions for three counts of aggravated felonious sexual assault (AFSA) under RSA 632-A:2, I(l) (2016) after a jury trial in the Superior Court (Will, J.). The case arose from allegations that the defendant sexually assaulted two four-year-old children, J.C. and R.M., during a playdate in August 2020.

The appeal presented three evidence-law issues: (1) whether the State could impeach its own witness (R.M.) with prior inconsistent statements when the witness offered little or no substantive testimony at trial; (2) whether J.C.’s statements to a pediatrician (Dr. Amy Roy) were admissible under New Hampshire Rule of Evidence 803(4) (medical diagnosis or treatment); and (3) whether the defense expert in forensic psychology/suggestibility (Dr. Eric Mart) was improperly restricted from offering testimony about “a child’s inflection” as a signal of misunderstanding.

2. Summary of the Opinion

The Court affirmed across the board. It held that the defendant’s “no substantive testimony” impeachment argument was unpreserved because it was not raised in the trial court; further, even assuming error in allowing impeachment, the defendant failed to establish plain error given repeated limiting instructions that the prior statements were admitted only for credibility, not for their truth. The Court also upheld admission of J.C.’s statements to Dr. Roy under Rule 803(4), finding sufficient circumstantial evidence that J.C. understood the medical purpose of the visit and that the circumstances supported trustworthiness. Finally, the Court upheld exclusion of the expert’s “inflection” testimony as an impermissible indirect comment on J.C.’s credibility, especially in light of defense counsel’s case-specific use of J.C.’s inflection to argue unreliability.

3. Analysis

A. Precedents Cited

1) Appellate review and discretion over evidence

  • State v. Munroe, 173 N.H. 469, 479 (2020): Reaffirmed that evidentiary rulings are reviewed for “unsustainable exercise of discretion,” and supplied the Court’s baseline hearsay framework (definition and general rule of inadmissibility with exceptions).
  • State v. Roy, 174 N.H. 622, 627 (2021): Emphasized the appellate posture—whether a reasonable person could reach the trial court’s decision on the record—not whether the Supreme Court would have ruled differently.

2) Preservation and forfeiture; plain error

  • State v. Batista-Salva, 171 N.H. 818, 822 (2019): Anchored the preservation rule (issues not raised below generally not reviewed) and placed the burden on the appellant to show the argument was specifically raised at trial.
  • State v. Gay, 169 N.H. 232, 248 (2016): Used to illustrate a common preservation failure—where the defendant did not seek reconsideration or otherwise alert the court to the specific theory advanced on appeal.
  • State v. Pinault, 168 N.H. 28, 34 (2015): Supplied the requirement that, for plain error, the defendant must show the error “actually affected the outcome of the proceeding.”

3) Impeachment with prior inconsistent statements and limiting instructions

  • State v. Soldi, 145 N.H. 571, 574 (2000): Quoted for the proposition that when the State calls a witness whose corroborating testimony is “instrumental,” the State may impeach the witness on conflicts with the State’s account. The defendant tried to extend Soldi into a limiting rule (i.e., no impeachment where there is no “instrumental” substantive testimony), but the Court did not reach that merits question due to lack of preservation.
  • State v. Dewitt, 143 N.H. 24, 28 (1998): Supported the Court’s reliance on limiting instructions as protection against unfair prejudice, reinforcing the idea that juries can be guided to consider statements only for credibility and not for truth.
  • State v. Cooper, 168 N.H. 161, 171 (2015): Reiterated the presumption that juries follow instructions, critical to rejecting plain error based on impeachment evidence introduced for a limited purpose.

4) Child medical-hearsay under Rule 803(4)

  • State v. Lynch, 169 N.H. 689, 702 (2017): Provided the controlling multi-part analysis under Rule 803(4), stressing “extra care” in determining a young child’s intent to seek diagnosis/treatment and requiring an affirmative record basis (not assumptions) for “treatment motive.”
  • State v. Munroe, 161 N.H. 618, 628 (2011): Used to show that a recognizable medical environment (equipment and exam room setting) can be circumstantial evidence supporting the child’s understanding of the medical purpose.
  • State v. Wade, 136 N.H. 750 (1993): The contrast case. In Wade, the record illuminated doctors’ intentions but “nothing in the record” shed light on the child’s intent; admission under Rule 803(4) was reversed. The Court distinguished Wade because this record contained circumstances bearing on J.C.’s motive and understanding.

5) Expert testimony and credibility boundaries

  • State v. Collins, 166 N.H. 210, 214 (2014): Reaffirmed that expert testimony on a particular child’s veracity is inadmissible because credibility is for the jury.
  • State v. McDonald, 163 N.H. 115, 123 (2011): Extended the prohibition to indirect credibility commentary, supporting exclusion even where an expert does not explicitly say the witness is lying or truthful.
  • State v. Raymond, 177 N.H. 459, 464 (2025), 2025 N.H. 30, ¶13: Distinguished permissible “general education testimony” from impermissible case-specific opinion that functions as a credibility attack; the Court relied on this line to characterize the defense questioning as case-targeted.
  • State v. Sargent, 148 N.H. 571, 576 (2002): Emphasized New Hampshire’s refusal to allow expert psychological testimony concerning the veracity of a child’s abuse testimony, reinforcing the trial court’s caution against “credibility by expert proxy.”

6) Waiver of unbriefed issues

  • State v. Blackmer, 149 N.H. 47, 49 (2003): Applied to deem waived any issues noticed on appeal but not briefed.

B. Legal Reasoning

1) State impeachment of its own witness: preservation first, plain error as backstop

The Court separated two questions: (a) whether the defendant preserved the specific “no substantive testimony, therefore no impeachment” theory; and (b) if not, whether allowing impeachment was plain error. On preservation, the Court held the defendant objected only on a different ground—whether “I don’t know/I don’t remember” answers could be impeached as effectively denials—so the trial judge never had an opportunity to rule on the appellate theory. That was dispositive under State v. Batista-Salva and Supreme Court Rule 16(3)(b).

On plain error, the Court assumed (without deciding) that an error occurred and was plain, but held the defendant failed to show outcome prejudice. The critical reasoning was the repeated limiting instructions restricting the jury’s use of the prior statements to credibility assessment only, coupled with the presumption in State v. Cooper that juries follow such instructions. The Court thus treated limiting instructions as sufficient to defeat the “affected substantial rights” prong of plain error in this record.

2) Rule 803(4): treatment motive and trustworthiness for young-child declarants

Applying Rule 803(4)’s three-part test as articulated in State v. Lynch, the Court focused on the two contested prongs: (1) whether J.C. intended to obtain medical diagnosis/treatment and (3) whether the circumstances established trustworthiness. The Court found adequate circumstantial proof of intent: Dr. Roy introduced herself as a children’s doctor; the setting was an exam room with recognizable medical equipment (consistent with State v. Munroe, 161 N.H. 618); and J.C.’s expressed concern—fear she was “getting sick” because she kept sneezing—signaled she understood a medical purpose.

The Court distinguished State v. Wade, where the record illuminated only the doctors’ intentions and not the child’s. Here, by contrast, the record contained evidence bearing on the child’s understanding, satisfying Lynch’s caution against assuming treatment motive “absent a record affirmatively establishing” it.

For trustworthiness, the Court largely relied on the same circumstances (medical setting, doctor identification, and the child’s medically oriented response) and cited Lynch for the proposition that open-ended questioning and a child’s response tied to physical concerns can support reliability.

3) Expert limits: “general education” versus case-specific credibility attack

The Court affirmed exclusion of the defense expert’s proposed testimony about inflection as a signal a child may not understand the “don’t guess” instruction. The key was not that such testimony is always barred in the abstract, but that—given the defense’s litigation posture—it would function as an indirect credibility opinion about J.C. Specifically, the Court relied on: (i) defense counsel’s motion to dismiss arguing J.C.’s substantive answers “were formed as questions” with upward inflection, and (ii) closing argument analogizing that inflection to seeking confirmation she “got the answer correct.” In that context, the trial court could reasonably view the expert question as designed to undermine J.C.’s credibility through a quasi-scientific lens, which Collins, McDonald, and Sargent forbid, and which Raymond distinguishes from permissible non-case-specific “general education testimony.”

C. Impact

  • Sharper preservation lesson for impeachment restrictions: The decision underscores that objections must articulate the specific theory later pursued on appeal. A defendant cannot object on one rationale (e.g., “I don’t know” is not impeachable) and later appeal on another (e.g., the witness provided no “instrumental” substantive testimony under State v. Soldi).
  • Rule 803(4) roadmap for child sexual-assault medical exams: The Court reinforces that treatment motive for young children can be established with concrete circumstantial evidence—doctor identification, medical surroundings, and the child’s own medically oriented concerns—while still honoring Lynch’s “extra care” requirement and Wade’s warning against silent records.
  • Expert testimony policing will be context-driven: Even “general-sounding” questions about child communication may be excluded if the surrounding arguments and questioning show the testimony is meant to comment indirectly on a specific child’s credibility. Trial courts are given broad discretion to assess that functional purpose from the full record.
  • Limiting instructions as an appellate shield under plain error: Where impeachment evidence is admitted for credibility only, repeated limiting instructions—combined with the presumption juries follow them—may make it difficult to prove outcome prejudice on plain-error review.

4. Complex Concepts Simplified

  • “Impeaching your own witness”: A party may call a witness who then gives testimony harmful or inconsistent with the party’s position; impeachment uses earlier inconsistent statements to challenge the witness’s credibility. In this case, the State used R.M.’s earlier disclosures to counter her trial testimony that she did not remember or did not know.
  • “Preservation”: Appellate courts generally review only issues clearly presented to the trial court. The rationale is fairness and efficiency: the trial judge must have the chance to rule correctly (or correct an error) in real time.
  • “Plain error”: A narrow exception that can allow review of unpreserved issues, but only if the error is clear and actually affected the outcome, and if leaving it uncorrected would seriously harm the integrity of proceedings.
  • Rule 803(4) medical-hearsay exception: Some statements made to obtain medical diagnosis/treatment can be admitted even though they are hearsay, because patients have a strong incentive to be truthful when seeking care. For young children, courts require record evidence that the child understood the medical purpose (the “treatment motive”), and that the circumstances indicate trustworthiness.
  • “Indirect credibility” expert testimony: Experts cannot tell a jury a witness is truthful or lying. The bar also covers testimony that effectively leads the jury to that conclusion indirectly (for example, by using expert framing to suggest the witness’s manner of answering proves unreliability).

5. Conclusion

State of New Hampshire v. Madison T. West is a tightly reasoned evidentiary decision with three principal takeaways: (1) appellate review is constrained by preservation; litigants must present the specific legal theory to the trial court; (2) child statements to medical providers in sexual-assault contexts may be admitted under Rule 803(4) when the record supports the child’s treatment motive and trustworthiness through concrete circumstances, distinguishing State v. Wade; and (3) expert testimony—even if couched in general terms—may be excluded when it operates as a case-specific, indirect attack on a child witness’s credibility, consistent with New Hampshire’s firm jury-province doctrine.