Rule 37 Sanctions in Parenting Cases: Courts May Limit Mental-Health Testimony to the Period Disclosed to the Parenting Evaluator

1. Introduction

Parenting of C.R.J. (Mont. 2026 MT 151) arises from long-running parenting-plan litigation between Colby R. Johnson (Father) and Jaclyn I. Beck (Mother) regarding their minor child, C.R.J. A central feature of the case was a court-ordered parenting evaluation conducted by Dr. Michael Bütz, appointed by stipulation. As part of that stipulation—later adopted as a court order—Mother agreed that her mental health providers would share all records with the evaluator within a defined timeframe.

The dispute on appeal did not concern the merits of the parenting plan directly, but rather a discovery sanction: the District Court limited the testimony of Mother’s long-time counselor, Dr. Polly Peterson, Ph.D., as a sanction under M. R. Civ. P. 37. Specifically, Dr. Peterson was barred from testifying about treatment provided or records created after July 8, 2023 (the date of the evaluator’s report), because those updated records were intentionally not produced to the evaluator or Father.

The Supreme Court’s decision addresses a recurring family-law tension: mental-health evidence can be highly probative to “best interests,” but litigation fairness depends on transparent disclosure and the ability to test opinions with the underlying records. The key issue was whether the District Court abused its discretion by imposing a targeted exclusion sanction.

2. Summary of the Opinion

The Montana Supreme Court affirmed. It held the District Court acted within its broad discretion to impose a proportional discovery sanction under Rule 37 where the record showed a deliberate, sustained refusal by Mother and Dr. Peterson to comply with (1) ordinary discovery duties and (2) a court-approved stipulation/order requiring production of mental-health treatment records to the parenting evaluator.

The Court emphasized:

  • The nonproduction was intentional (not inadvertent or based on privilege disputes litigated through protective orders).
  • The missing information created a substantial evidentiary gap (“black hole”) on a central issue: Mother’s current mental-health treatment and progress.
  • Father was prejudiced because he could not prepare for cross-examination or evaluate the basis for opinions formed after July 8, 2023.
  • The sanction was tailored: Dr. Peterson could testify about the disclosed period (through July 8, 2023), but not about undisclosed later treatment.

3. Analysis

A. Precedents Cited

1) Mont. State Univ.-Bozeman v. Mont. First Judicial Dist. Court

The Court relied on Mont. State Univ.-Bozeman v. Mont. First Judicial Dist. Court (2018 MT 220) to frame both the standard of review and the sanctions analysis. The precedent supplies two key rules that drive the outcome:

  • Broad district-court discretion in Rule 37 sanctions because trial courts are best positioned to assess discovery abuses and their effects.
  • A structured three-factor proportionality check: (1) extent/nature of abuse, (2) prejudice, (3) proportional relation of sanction to violation.

In Parenting of C.R.J., these factors map cleanly to the record: an intentional refusal to disclose, direct prejudice to Father’s ability to test expert opinions, and a sanction limited to the nondisclosed timeframe.

2) Peterman v. Herbalife

Peterman v. Herbalife (2010 MT 142) is used for both policy and doctrine. First, it reiterates Montana’s “low-tolerance” approach to discovery abuse, encouraging meaningful sanctions rather than repeated second chances. Second, it confirms that district courts have considerable leeway to select sanctions that fit the conduct and that sanctions must be roughly proportionate to the gravity of the abuse and inconvenience to the court and the other party.

Critically, Peterman also supports the Court’s rejection of Mother’s procedural complaint: the Supreme Court notes that neither Rule 37(b)(2) nor Montana precedent requires an express warning before sanctions. That principle matters here because the sanction flowed from deliberate noncompliance with both discovery rules and a court order adopted from the parties’ own stipulation.

3) Mont. Power Co. v. Wax

Mont. Power Co. v. Wax (244 Mont. 108, 1990) is cited for the idea that the harm of nondisclosure is not merely “surprise,” but the impairment of meaningful cross-examination. The Court uses this to answer Mother’s argument that any prejudice was minimal because Dr. Peterson could testify from memory. The precedent supports the opposite conclusion: without the underlying records, Father cannot effectively test what the witness claims to remember, what was recorded contemporaneously, and how the opinions evolved.

4) Ewalt v. Scott

Ewalt v. Scott (206 Mont. 503, 1983) is invoked to situate the sanction within Montana’s broader acceptance that strong Rule 37 tools—including severe remedies—may be used when parties openly disregard discovery or disobey orders. Although the sanction here was far short of dismissal/default, Ewalt underscores that courts need not tolerate defiance that threatens adjudicative fairness.

B. Legal Reasoning

The Court’s reasoning proceeds in a disciplined sequence: (1) identify the governing discovery duties; (2) determine whether the conduct was intentional; (3) measure prejudice; (4) evaluate proportionality and tailoring.

1) The governing duties and available sanctions

  • Rule 26(b)(1) defines the breadth of discoverable information (non-privileged, relevant, reasonably calculated to lead to admissible evidence).
  • Rule 34 compels production of documents within that scope upon request.
  • Rule 26(e) imposes a continuing duty to supplement incomplete or outdated discovery responses.
  • Rule 37(c)(1) authorizes a default evidentiary consequence: the noncompliant party generally may not use the withheld information/witness unless the failure was substantially justified or harmless.
  • Rule 37(b) authorizes sanctions for failure to obey a discovery order—especially salient here because the stipulation about sharing “all records” was adopted as an order.

2) Intentionality: “purposeful non-compliance” rather than mistake

The Supreme Court treats intent as pivotal. Dr. Peterson admitted she received both a signed release and a written request from Dr. Bütz, understood the purpose, and refused anyway because she did not trust the evaluator and feared misuse. Mother knew of the refusal and did not supplement discovery. Importantly, neither Mother nor Dr. Peterson sought a protective order or any judicially managed limitation on disclosure—an omission that made the refusal look less like legitimate confidentiality management and more like unilateral obstruction.

3) Prejudice: inability to test the “post-report” opinions

The Court rejects the claim that prejudice was minimal. The missing records were not collateral; they went to Mother’s current treatment and progress—information with obvious bearing on parenting-plan best-interests determinations. Without updated records, Father could not assess what Dr. Peterson’s later opinions were based on, prepare rebuttal evidence, or cross-examine effectively.

4) Proportionality and tailoring: exclusion limited to the nondisclosed timeframe

The sanction is the centerpiece of the Court’s proportionality analysis. The District Court did not exclude Dr. Peterson entirely. It allowed testimony about treatment through July 8, 2023 (the point up to which the evaluator’s report existed) and precluded testimony about later treatment and records that were withheld. The Supreme Court views this as a direct fit between violation and consequence: it avoids rewarding nondisclosure while preserving what was properly in the record.

C. Impact

Parenting of C.R.J. is likely to have meaningful practical effects in Montana family-law litigation:

  • Parenting evaluators and stipulated disclosure: When parties stipulate (and courts order) that mental-health providers “shall share all records,” the Supreme Court signals that noncompliance—especially intentional—will justify evidence-limiting sanctions.
  • Strategic nondisclosure is high-risk: The opinion discourages a tactic sometimes seen in custody disputes: presenting favorable therapist testimony while withholding the contemporaneous treatment notes that would allow scrutiny of diagnoses, progress, inconsistencies, or alternative explanations.
  • Records matter as much as testimony: The Court’s use of Mont. Power Co. v. Wax reinforces that “memory” testimony is not a substitute for disclosed documentation when the opposing party is entitled to test the basis for opinions.
  • Procedural takeaway: If confidentiality, privilege, or misuse is genuinely feared, the correct path is to seek a protective order or court-managed restrictions—not unilateral refusal. Failure to use that mechanism may be treated as deliberate noncompliance.

4. Complex Concepts Simplified

Rule 37 discovery sanction
A court-imposed consequence for breaking discovery rules or ignoring discovery orders. Common sanctions include limiting evidence, excluding witnesses, awarding fees, or (in extreme cases) dismissal/default.
Supplementation (Rule 26(e))
A continuing duty to update earlier discovery responses when they become incomplete or inaccurate—e.g., when additional treatment records are created after earlier disclosures.
Protective order
A court order that can limit how sensitive information is produced or used (e.g., confidentiality designations, in camera review, restricted dissemination). The opinion highlights that parties should seek this relief rather than refusing to comply.
Parenting evaluator
A neutral professional appointed to assess family dynamics and make recommendations bearing on the child’s best interests. The evaluator’s work depends on access to relevant collateral records—here, the mother’s mental-health records.
“Hybrid” witness
A treating professional who may offer both fact testimony (what they observed) and opinion testimony (clinical impressions), sometimes resembling expert testimony. Because such opinions can influence outcomes, disclosure obligations matter.

5. Conclusion

Parenting of C.R.J. reinforces a clear rule for Montana litigation, including parenting-plan disputes: when a party intentionally withholds discoverable mental-health records—especially in defiance of a court-approved stipulation/order—district courts may impose targeted Rule 37 sanctions that limit the provider’s testimony to the time period covered by disclosed records. The decision strengthens discovery integrity, protects the opposing party’s ability to prepare and cross-examine, and confirms that courts need not tolerate unilateral refusals masquerading as confidentiality concerns when protective-order procedures are available.