Peo v. Martinez — Colorado Court of Appeals affirms sexual assault conviction despite challenges to expert testimony and juror conduct

Case
The People of the State of Colorado, v. Raymond Anthony Martinez
Court
Colorado Court of Appeals
Judge
JUDGE HARRIS (appointment info not available)
Date Decided
July 23, 2026
Docket No.
23CA1794
Topics
Waiver, Prosecutorial Misconduct, Juror Misconduct, Sexual Assault
Source
Read the full opinion

Background

Raymond Anthony Martinez was convicted of sexually assaulting his granddaughter. This was his second trial, as the first ended in a mistrial. Leading up to the first trial, the court had ruled that an expert witness could testify about “grooming” only if it fit the facts of the case, and later clarified that the expert could discuss how trust develops but could not use the specific word “grooming.”

On appeal, Martinez challenged his conviction on two grounds. First, he argued that the trial court erred by admitting expert testimony about “grooming” and that the prosecutor committed misconduct by eliciting it in defiance of the prior court order. Second, he contended that the trial court should have dismissed a juror who allegedly fell asleep during a portion of the trial.

The Court’s Holding

The Colorado Court of Appeals affirmed Martinez’s conviction, rejecting both of his contentions. Regarding the “grooming” testimony, the court found that Martinez waived his objection. While defense counsel initially objected during the expert’s testimony, she affirmatively withdrew the objection after a bench conference discussing the scope of the prior order. The court stated that an affirmative withdrawal of an objection constitutes an intentional relinquishment of a known right, leaving nothing for appellate review.

The court also rejected Martinez’s claim of prosecutorial misconduct. Because this claim was not raised at trial, the court reviewed it for plain error and found no obvious error that seriously undermined the trial’s fundamental fairness, especially given that no party accurately remembered the court’s prior ruling. Furthermore, the court concluded that any prejudice from the brief “grooming” reference was insignificant due to the overwhelming, properly admitted evidence of Martinez’s guilt.

Concerning the allegedly sleeping juror, the Court of Appeals deferred to the trial court’s discretion. The trial judge, who also observed the jury, directly questioned the juror in question. The juror denied sleeping, attributing his posture to an eye irritation, and the trial court found his explanation credible based on his demeanor. The appellate court affirmed, emphasizing its deferential standard of review for trial court credibility determinations and findings of fact regarding juror conduct.

Key Takeaways

  • An attorney’s affirmative withdrawal of an objection at trial constitutes waiver of that issue, precluding appellate review.
  • Unpreserved claims of prosecutorial misconduct are reviewed only for plain error, requiring an “obvious” error that fundamentally undermined the trial’s fairness.
  • Appellate courts defer significantly to trial courts’ observations and credibility findings, particularly when assessing juror conduct and demeanor.
  • Overwhelming evidence of guilt can render minor trial errors or unpreserved misconduct claims non-prejudicial on appeal.

Why It Matters

This ruling reinforces the crucial importance of procedural diligence in preserving objections during trial. Defense attorneys must be steadfast in maintaining their objections to ensure issues are properly preserved for appellate review; withdrawing an objection, even after initial concerns, can effectively relinquish the right to challenge that issue on appeal. This case also highlights the high bar for overturning a trial court’s factual findings regarding juror conduct, underscoring the appellate court’s deference to the trial judge’s direct observation of the courtroom.

For practitioners, this serves as a reminder that the appellate process heavily relies on a meticulously built trial record. Issues of prosecutorial conduct or juror impartiality must be clearly raised, argued, and ruled upon by the trial court to provide a basis for meaningful appellate review, especially when attempting to overcome the hurdle of overwhelming evidence presented at trial.

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