Derek Chauvin, the former Minneapolis police officer convicted of murdering George Floyd in 2020, has filed a new appeal challenging a judge's refusal to grant him a new trial. The appeal, lodged on 29 June, contests a 1 May ruling that rejected his petition for post-conviction relief, marking his latest attempt to overturn his conviction and continuing a case that drew global attention to policing and race in the United States.

Chauvin was convicted in April 2021 of second-degree murder, third-degree murder and second-degree manslaughter, and later sentenced to 22 and a half years in prison for kneeling on Floyd's neck for nine minutes and 29 seconds. His petition, first filed in November 2025 and represented by attorney Gregory Joseph, argued that prosecutors improperly relied on video evidence, that jury instructions were flawed, and that police officials gave false testimony. The judge dismissed all claims in a 41-page order, repeatedly citing Minnesota's Knaffla rule, which bars defendants from raising issues in post-conviction proceedings that were, or could have been, decided on direct appeal.