Nonconstitutional Harmless-Error Review | Thompson v. State (2026)

Thompson v. State, 05-25-00744-CR, June 22, 2026.

On appeal from 489th District Court, Kaufman County, Texas

Synopsis

Assumed error in admitting a police officer’s testimony that she found the complainant credible did not require reversal because the error was nonconstitutional and did not affect the defendant’s substantial rights under Texas Rule of Appellate Procedure 44.2(b). The Dallas Court of Appeals treated the challenged testimony as brief, un-emphasized, and outweighed by other substantial evidence, including physical-injury evidence and jail-call evidence.

Relevance to Family Law

For Texas family-law litigators, Thompson matters less because it is a criminal assault-by-strangulation case and more because it is a clean appellate reminder that improper credibility-vouching will not necessarily produce reversal unless the record shows real prejudice. That principle translates directly into protective-order litigation, SAPCR modification proceedings, divorce cases with family-violence allegations, and property disputes shaped by fault or waste claims: if objectionable opinion testimony about whether a complainant, child, or party is “credible” comes in, the appellate outcome will often turn not on the existence of error alone, but on whether the testimony was repeated, featured, and likely outcome-determinative in light of the entire record. For trial lawyers handling custody and divorce cases built around assault, coercive control, or strangulation allegations, Thompson is a record-building case.

Case Summary

Fact Summary

The defendant was tried for third-degree felony assault family violence by impeding breath or circulation. The indictment alleged that he intentionally, knowingly, or recklessly caused bodily injury to Tabatha Williams, a person with whom he had or had had a dating relationship, by impeding her normal breathing or circulation through pressure to the throat or neck and/or blocking the nose or mouth.

At trial, the complainant did not provide substantive testimony. Called by the defense, she invoked the Fifth Amendment to each question, including whether she made a report and whether she filed an affidavit of non-prosecution. The State instead relied on three other witnesses. The responding patrol sergeant testified about meeting Williams at the hospital and observing that she was emotional, scared, and injured. A records custodian authenticated jail calls and testified that one call included an apparent admission by the defendant to choking Williams. The State’s expert, a forensic nurse with domestic-violence and strangulation training, testified that the complainant’s injuries were consistent with strangulation and generally inconsistent with consensual rough sexual activity.

The challenged testimony arose during the State’s direct examination of the responding officer. After establishing that Williams did not want charges pursued, the prosecutor asked why the officer nevertheless filed the case and then asked, over objection, why the officer found Williams credible that night. The officer answered that the complainant’s visible emotional state and visible injuries made her credible. The State did not return to that testimony in closing argument and did not make credibility-vouching a centerpiece of its summation.

Defense counsel, by contrast, highlighted the complainant’s Fifth Amendment invocation in closing and argued that her refusal to testify undermined her credibility. The appellate court therefore evaluated the complained-of testimony against a record in which the challenged opinion was brief, not heavily used, and surrounded by other evidence the jury could independently assess.

Issues Decided

• Whether assumed evidentiary error in admitting a police officer’s testimony vouching for the complainant’s credibility required reversal under Texas Rule of Appellate Procedure 44.2(b).
• Whether the record showed that the complained-of credibility testimony affected the defendant’s substantial rights.
• The opinion also addressed a separate jury-charge issue concerning relationship theories broader than those alleged in the indictment, but the principal point relevant here is the court’s harmless-error analysis on the credibility testimony.

Rules Applied

The court applied Texas Rule of Appellate Procedure 44.2(b), which governs nonconstitutional error. Under that rule, a nonconstitutional error that does not affect substantial rights must be disregarded. The court’s analysis tracked the familiar substantial-rights inquiry: whether the error had a substantial and injurious effect or influence in determining the jury’s verdict.

The opinion relied on Motilla v. State, 78 S.W.3d 352 (Tex. Crim. App. 2002), which remains the standard reference point for assessing harm from nonconstitutional error. Under Motilla, reviewing courts look at the entire record, including the nature of the error, whether the State emphasized it, the presence or absence of corroborating or contradictory evidence, the strength of the State’s case, and closing argument.

Although the court assumed error without deciding admissibility, the underlying evidentiary concern is familiar: a witness, especially a law-enforcement witness, generally should not opine directly that another witness was credible, because credibility determinations belong to the factfinder.

Application

The court did not spend its time deciding whether the officer’s testimony was technically admissible. Instead, it assumed the trial court erred and moved directly to whether the assumed error warranted reversal. That was the strategic center of the opinion.

Looking at the full record, the court concluded the challenged credibility testimony did not affect the defendant’s substantial rights. The officer’s vouching testimony was short. It consisted of a single explanation that the complainant appeared credible because of visible emotions and visible injuries. The State did not build its case around that answer, did not revisit it in examination in any meaningful way, and did not exploit it in closing argument. That mattered. Harm analysis under Rule 44.2(b) is often driven by emphasis, and the absence of emphasis strongly favored affirmance.

The surrounding evidence also mattered. The State had evidence independent of the officer’s credibility opinion: the complainant’s visible injuries, hospital-related observations, expert testimony that the injuries were consistent with strangulation rather than consensual rough sex, and jail-call evidence interpreted as an admission to choking the complainant. In other words, the jury was not left to decide guilt based solely on whether the officer vouched for the complainant. The record contained substantive evidence from which the jury could reach the same result without relying on the improper opinion.

The defense’s own closing reinforced the court’s no-harm conclusion in an indirect way. Defense counsel vigorously attacked the complainant’s credibility based on her Fifth Amendment invocation and expressly told the jurors that credibility was for them to decide. That argument helped show that credibility remained a live jury issue rather than one foreclosed by the officer’s testimony. The appellate court therefore treated the officer’s statement as a minor evidentiary event in a larger record, not as a verdict-driving feature of the trial.

Holding

The court held that even assuming the trial court erred by allowing the responding officer to testify that she found the complainant credible on the night of the offense, the error was nonconstitutional and harmless under Texas Rule of Appellate Procedure 44.2(b). Because the testimony was brief, not emphasized by the State in closing, and accompanied by substantial other evidence of guilt, the defendant failed to show an effect on substantial rights.

The court also held, in a separate part of the opinion, that assumed charge error regarding broader relationship theories did not egregiously harm the defendant. The judgment of conviction was therefore affirmed.

Practical Application

For family-law trial counsel, Thompson is a useful warning that appellate courts will usually ask two separate questions when confronted with improper credibility testimony: was it error, and did it matter? In custody cases, protective-order hearings, enforcement actions, and fault-based divorce trials, lawyers often confront police officers, CPS workers, therapists, forensic interviewers, and family members who drift from factual observation into credibility endorsement. The objection remains important, but Thompson teaches that preserving error is only half the job. The real work is proving prejudice through the record.

If you represent the objecting party, do not assume that “Officer X said she believed the complainant” is enough for reversal. You need a record showing repetition, argument emphasis, lack of corroboration, and a close evidentiary case. If the opponent uses the witness’s credibility opinion as a bridge over weak facts, say so repeatedly and specifically. In contrast, if you represent the proponent of the verdict, Thompson gives you a roadmap for defending the judgment: isolate the testimony, minimize emphasis, and show the trial turned on independent evidence rather than on a witness’s endorsement of another witness’s truthfulness.

In divorce and SAPCR litigation involving family violence, strangulation allegations, or coercive-control narratives, the case also underscores the value of non-vouching corroboration. Photographs, medical records, contemporaneous texts, 911 calls, body-cam footage, neutral witness observations, admissions, and expert testimony tied to objective findings will do far more appellate work than a conclusory statement that the accusing witness seemed believable. In practical terms, Thompson rewards trial lawyers who prove abuse through facts, not credibility labels.

Checklists

Preserving Objections to Credibility-Vouching

• Object that the testimony invades the factfinder’s role on credibility.
• Object that the question calls for an improper opinion on truthfulness.
• If appropriate, object under Rules 701, 702, and 403 in addition to the general credibility objection.
• Request a running objection if the line of questioning is likely to continue.
• Ask for an instruction to disregard if the testimony is admitted.
• Move for mistrial when the testimony is prominent enough to risk incurable harm.
• Make sure the objection and ruling are clear in the reporter’s record.

Building Harm for Appeal

• Show that the improper testimony was repeated, not isolated.
• Identify every place where counsel emphasized the testimony in opening, witness examination, or closing.
• Demonstrate the absence of strong corroborating evidence.
• Highlight whether the complainant or key witness was unavailable, recanted, or had major impeachment exposure.
• Tie the improper opinion to a genuinely contested factual issue.
• Explain why the case was close without the objectionable testimony.
• Point to any jury notes, split-verdict indicators, or other signs that the verdict was not inevitable.

Trying Family-Violence Allegations Without Inviting Reversible Error

• Focus witness testimony on observations, injuries, demeanor, timeline, and physical evidence.
• Ask officers and professionals what they saw, heard, documented, and did.
• Avoid asking whether a complainant, child, or party was “credible,” “truthful,” or “believable.”
• Use expert testimony to interpret injuries or behavior patterns, not to endorse a witness’s honesty.
• Corroborate with records, recordings, metadata, texts, photos, and admissions.
• Keep closing argument anchored to evidence rather than institutional endorsements.

Defending a Judgment After Improper Opinion Testimony Comes In

• Argue that any error was nonconstitutional and subject to Rule 44.2(b).
• Emphasize that the challenged testimony was brief and isolated.
• Show the opponent did not obtain a curative instruction or further relief, if applicable.
• Demonstrate that the testimony was not featured in closing argument.
• Walk the appellate court through the independent evidence supporting the judgment.
• Argue that the factfinder had ample basis to decide credibility without relying on the improper opinion.

Applying Thompson in Divorce, Custody, and Protective-Order Cases

• In divorces, use the case to frame harmless-error arguments when one side complains about a police officer’s or therapist’s credibility comments.
• In custody modifications, evaluate whether the challenged opinion actually drove the best-interest findings or whether objective evidence did the work.
• In protective-order litigation, remember that improper vouching may still be harmful if the case turns almost entirely on one witness and there is little corroboration.
• In property disputes involving fault, reimbursement, or waste linked to abuse allegations, build the record with documents and objective proof rather than character-based endorsements.
• In appellate briefing, separate the evidentiary-error argument from the harm argument and devote real space to both.

Citation

Thompson v. State, No. 05-25-00744-CR, 2026 WL ___ (Tex. App.—Dallas June 22, 2026, no pet. h.) (mem. op.).

Full Opinion

Read the full opinion here

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