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Keeping witnesses apart

Raynaldo Rivera Ortiz, Jr. v. United States

Updated Nov 12, 2026

In brief

Where it stands
Dismissed

Petition denied.

What it’s about
Dr.
Who it affects
Ortiz’s request for Supreme Court review ended without an answer to the evidence questions he raised.

Summary: written with AI from the case record.

Illustration for Raynaldo Rivera Ortiz, Jr., Petitioner v. United States
Conceptual illustration · AI-generated

What it's about

Raynaldo Rivera Ortiz, Jr., asked the Supreme Court to review whether a judge may let a witness testify after violating an order to keep witnesses apart, who must prove resulting harm, and whether jury instructions can make wrongly admitted evidence harmless. The Court refused to hear his case (denied review) and did not decide those issues.

The dispute involved federal evidence rules on keeping witnesses apart and deciding whether evidence may be admitted at trial.

Question presented

1. Whether district courts have the discretion to permit witnesses to testify even if they have violated an order issued under Federal Rule of Evidence 615? 2. Which party bears the burden of persuasion to establish prejudice, or lack of prejudice, when a criminal defendant shows a deviation from Federal Rule of Evidence 615? 3. Whether the presumption that juries follow their instructions establishes harmless error in a case involving the erroneous admission of evidence under Federal Rules of Evidence 403 or 404?

Documents

1

Docket activity

6
  • New analysis added

    Nov 12, 2026 · Court records

  • AI analysis generated: Case Briefing

    Nov 12, 2026 · Generated

  • AI analysis generated: Decision Record

    Nov 12, 2026 · Generated

  • Case data updated: summary, question_presented, generation_metadata

    Nov 12, 2026 · Court records

  • Case data updated: question_presented, extraction_metadata

    Nov 12, 2026 · Court records

Show 1 more
  • Brief added: Petition

    Sep 30, 2026 · Court records

Sources

Primary materials plus reporting. Best-effort analysis: this explainer relies on a mix of primary materials and trusted secondary sources. Official filings and opinions remain authoritative.

Checked Nov 12, 2026Methodology

Court records and filings

Reporting and analysis