The Supreme Court of the United States issued a significant ruling on June 18, 2026, regarding the enforceability of appeal waivers in criminal cases. The case, Hunter v. United States (Docket No. 24-1063), involved Munson Hunter III, who was convicted of wire fraud. The ruling clarifies that appeal waivers are unenforceable if enforcing them would result in a miscarriage of justice.

This decision is crucial for defendants like Hunter, who may feel that certain aspects of their sentences violate their constitutional rights. The ruling emphasizes that while plea agreements often include waivers of the right to appeal, there are limits to this practice, especially when fundamental rights are at stake.

Background

Munson Hunter III faced ten counts of bank and wire fraud, allegedly costing financial institutions around half a million dollars. He entered into a plea agreement with the government, pleading guilty to one count of aiding and abetting wire fraud. In exchange, the government dismissed the other charges and agreed not to prosecute him for the same conduct in the future.

The plea agreement included an appeal waiver, which stated that Hunter could not appeal his conviction or sentence, except for claims of ineffective assistance of counsel. The agreement also specified that any changes to its terms must be in writing and signed by all parties. The District Court accepted Hunter's plea, deeming it voluntary and knowing.

During sentencing, the court imposed a 51-month prison term followed by three years of supervised release, which included a condition requiring Hunter to take prescribed mental health medications. Hunter objected to this medication requirement, arguing that it infringed on his fundamental rights. After the sentencing hearing, the court mistakenly stated that Hunter had the right to appeal, leading to confusion about the enforceability of the appeal waiver.

The Ruling

The Supreme Court ruled that an agreement not to appeal a sentence is unenforceable if it would result in a miscarriage of justice. Justice Elena Kagan delivered the opinion of the Court, stating, "An agreement not to appeal a sentence is unenforceable when it would result in a miscarriage of justice—meaning, when it would leave in place the kind of egregious error that would bring the judicial system into disrepute."

The Court found that the District Court’s misstatement about Hunter’s appeal rights did not negate the validity of the appeal waiver. The Court emphasized that the plea agreement specified that any modifications must be in writing, and thus the court's verbal statement could not change the agreement. The ruling also clarified that the government did not forfeit its right to enforce the appeal waiver by remaining silent during the sentencing hearing.

The Court recognized that while appeal waivers must be knowing and voluntary, they are also subject to limits. The ruling established that a waiver is unenforceable if it leads to a miscarriage of justice, which includes situations where a sentence exceeds the statutory maximum or involves blatant constitutional errors.

Impact

This ruling has significant implications for defendants in similar situations. It establishes a higher standard for when appeal waivers can be enforced, ensuring that defendants have a pathway to challenge potentially unjust sentences. The Court's decision aligns with the majority view among other courts of appeals that have adopted a miscarriage-of-justice standard.

The ruling serves as a safeguard for the integrity of the judicial system, emphasizing that courts must maintain oversight over plea agreements and their consequences. This standard allows for judicial review in cases where a waiver may perpetuate egregious errors, thereby protecting defendants' rights and upholding public confidence in the legal system.

What's Next

The case has been remanded to the Fifth Circuit Court of Appeals to determine whether Hunter's challenge to the mandatory medication condition meets the miscarriage-of-justice standard. This ruling opens the door for further legal discussions on the enforceability of appeal waivers and the rights of defendants in the criminal justice system.