Recantation-Based New Trial Denied Absent Probable Different Result; Giglio Relief Requires Material Impeachment Evidence in the Record

1. Introduction

In MATTHEWS (JEMAR) v. STATE (CRIMINAL) (Nev. May 29, 2026), the Supreme Court of Nevada affirmed the denial of Jemar Demon Matthews’s motion for a new trial following his third trial and conviction for murder and related offenses arising from a September 30, 2006 shooting at 1271 Balzar Avenue in Las Vegas.

The motion was driven by (a) a post-trial recantation declaration by prosecution witness Nicholas Owens, and (b) alleged nondisclosure of impeachment evidence—specifically a recording of Owens’s 2007 police statement and an alleged undisclosed “benefit” Owens purportedly received for testifying—framed as a violation of Giglio v. United States, 405 U.S 150, 154 (1972).

The court’s decision sits against an unusually complex procedural history: federal post-conviction relief in Matthews v. Neven, 250 F. Supp. 3d 751, 755-56 (D. Nev. 2017); a second conviction reversed for a Batson error in Matthews v. State, 136 Nev. 343, 349, 466 P.3d 1255, 1262 (2020); and affirmance of the third-trial conviction in Matthews v. State, No. 84339, 2023 WL 3408185 (Order of Affirmance, May 11, 2023).

The central legal issues on this appeal were: (1) what a defendant must prove to obtain a new trial based on a witness’s recantation under Nevada law, and (2) what constitutes material nondisclosure of impeachment evidence under Giglio, particularly where the appellate record is incomplete.

2. Summary of the Opinion

The Supreme Court of Nevada affirmed. It held that Matthews did not satisfy Nevada’s established four-part test for a recantation-based new trial, principally because he failed to show it was probable the result would have been different without Owens’s testimony. It also held there was no Giglio violation because (a) the 2007 recorded statement was found by the district court to be consistent with Owens’s trial testimony (and Matthews failed to include the recording in the appellate record), and (b) the district court reasonably found Owens received no benefit for testifying.

3. Analysis

3.1. Precedents Cited

  • Callier v. Warden, Nev. Woinen's Corr. Ctr., 111 Nev. 976, 990, 901 P.2d 619, 627-28 (1995)
    The court treated Callier as the controlling framework for motions for a new trial premised on recanted testimony. It reiterated the four required findings: (1) the testimony was false; (2) proof of falsity is newly discovered; (3) it could not have been discovered for trial with reasonable diligence; and (4) it is probable that absent the false testimony the outcome would have differed.
  • Rippo v. State, 113 Nev. 1239, 1250, 946 P.2d 1017, 1024 (1997)
    Cited for the deferential standard of review: denial (or grant) of a new-trial motion is reviewed for abuse of discretion. This mattered because the Supreme Court’s task was not to decide the motion anew, but to decide whether the district court’s decision fell outside the range of reasonable outcomes.
  • Giglio v. United States, 405 U.S 150, 154 (1972)
    The court applied Giglio to the two categories of alleged impeachment evidence (the 2007 recording and alleged consideration/benefits), emphasizing the requirement that withheld impeachment evidence must have a “reasonable likelihood” of affecting the jury’s judgment to warrant relief.
  • Cuzze v. Univ. & Cinty. Coll. Sys. of Nev., 123 Nev. 598, 603, 172 P.3d 131, 135 (2007)
    The court relied on Cuzze to resolve the missing-record problem: when an appellant fails to provide necessary materials on appeal, the court presumes the missing materials support the district court’s ruling. This presumption effectively foreclosed Matthews’s claim that the 2007 recording contained impeachment value inconsistent with the trial testimony.
  • Matthews v. Neven, 250 F. Supp. 3d 751, 755-56 (D. Nev. 2017) and Matthews v. State, 136 Nev. 343, 349, 466 P.3d 1255, 1262 (2020)
    These decisions functioned primarily as procedural context, underscoring that Matthews had been tried multiple times, and that the third trial introduced Owens’s live testimony for the first time.

3.2. Legal Reasoning

A. Recantation and the Callier test under NRS 176.515

The court emphasized that NRS 176.515 permits a new trial on newly discovered evidence, but recantation evidence is tested rigorously under Callier v. Warden, Nev. Woinen's Corr. Ctr., 111 Nev. 976, 990, 901 P.2d 619, 627-28 (1995).

Although Owens’s 2023 declaration was “new” in the temporal sense and could not have been discovered earlier, the Supreme Court focused on two practical deficits in Matthews’s showing:

  • Failure to establish falsity in a persuasive way: Owens’s trial testimony in 2021 matched his 2007 statement, and the recantation came two years later. The timing and inconsistency supported the district court’s skepticism.
  • Failure on the probability-of-different-result prong: Even assuming arguendo the testimony was false, the court held Matthews did not show it was probable the jury would have reached a different verdict without Owens. The court stressed that Matthews had been convicted twice before without Owens’s testimony and that Owens’s trial testimony was limited (guns procurement request) and did not directly identify Matthews as a shooter. The court contrasted that limited testimony with other evidence the jury heard—police eyewitness identification, gunshot residue analysis, and other trial evidence—deeming the overall case “overwhelming.”

This reasoning reflects a key doctrinal point: under Callier, recantation is not treated as automatically “case-dispositive”; it must be material in the sense of likely changing the outcome, and the moving party bears that burden.

B. No Giglio violation: recording and alleged benefits

The court treated Matthews’s nondisclosure arguments as classic impeachment claims under Giglio: the State must disclose impeachment evidence relevant to credibility, and relief requires a “reasonable likelihood” the nondisclosure affected the jury’s judgment.

(1) The 2007 recorded statement: The district court found the recording contained statements consistent with Owens’s trial testimony, i.e., not impeaching. Matthews did not provide the recording on appeal. Applying Cuzze v. Univ. & Cinty. Coll. Sys. of Nev., 123 Nev. 598, 603, 172 P.3d 131, 135 (2007), the Supreme Court presumed the omitted item supported the district court’s ruling. It further held that even if the recording had some impeachment value, Matthews still did not show a reasonable likelihood it would have changed the verdict given the evidence against him.

(2) Alleged benefit for testifying: Matthews claimed Owens was released from custody immediately after testifying, implying undisclosed consideration. The court rejected the factual premise, noting the record showed seven months between Owens’s testimony and his release, and that the record included testimony from Owens, the prosecutor, and Detective Carter that no benefit was offered. On that record, the court held the district court acted within its discretion in finding no undisclosed deal and thus no Giglio violation.

3.3. Impact

The opinion’s practical significance is less about creating a brand-new doctrinal test and more about clarifying (and tightening) how existing standards operate in hard, post-judgment settings:

  • Recantations face a high materiality hurdle: Even where a recantation is “new,” defendants must concretely show the trial would probably have come out differently. Courts may look to the overall evidentiary record and even to the outcome of prior trials (here, two earlier convictions) as an indicator of whether the recanted testimony truly mattered.
  • Appellate record completeness is outcome-determinative: The reliance on Cuzze signals that defendants pursuing nondisclosure claims must build the appellate record; otherwise, Nevada’s presumption will often defeat claims that hinge on the contents of missing materials.
  • Giglio claims require more than suspicion of a “deal”: The court accepted the district court’s factfinding where the timeline and witness/prosecutor testimony undercut the inference of an undisclosed benefit.

Future litigants should expect Nevada courts to demand a tightly documented showing—both factually (record evidence of falsity/benefit) and causally (why the withheld or false evidence would likely change the verdict).

4. Complex Concepts Simplified

  • Recantation: A witness later says their trial testimony was untrue. Courts treat recantations cautiously because they can be motivated by pressure, regret, or later incentives.
  • Impeachment evidence: Information used to challenge a witness’s credibility (e.g., prior inconsistent statements, bias, deals with the State).
  • Giglio rule: The prosecution must disclose evidence that could be used to impeach its witnesses, including promises, rewards, or inducements to testify.
  • “Reasonable likelihood” of affecting the jury: Not every nondisclosure matters; relief generally requires that the missing impeachment evidence could realistically have changed how jurors evaluated the case.
  • Abuse of discretion: A deferential appellate standard; the appellate court will uphold the district court unless its decision was outside the bounds of reason.
  • Missing-record presumption (Cuzze): If the appellant does not include key materials in the record, the appellate court assumes those materials support the lower court’s decision.
  • Batson issue (contextual): A constitutional problem involving discriminatory jury selection; it explains why the second conviction was reversed in Matthews v. State (2020), but it was not the focus of this 2026 appeal.

5. Conclusion

This decision reinforces two demanding post-conviction principles in Nevada practice. First, under Callier v. Warden, Nev. Woinen's Corr. Ctr., 111 Nev. 976, 990, 901 P.2d 619, 627-28 (1995) and NRS 176.515, a recantation—even if newly discovered—does not justify a new trial without a persuasive showing that the testimony was false and that its absence would probably have changed the verdict. Second, under Giglio v. United States, 405 U.S 150, 154 (1972), nondisclosure warrants relief only where the evidence is truly impeaching and reasonably likely to affect the jury—and appellants must supply the materials needed to test that claim, or face the Cuzze v. Univ. & Cinty. Coll. Sys. of Nev., 123 Nev. 598, 603, 172 P.3d 131, 135 (2007) presumption.