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SCOTUS HOLDS APPELLATE WAIVERS AREN’T ALWAYS IRONCLAD
Just about the last thing any defendant is concerned with when signing a plea agreement with the federal government is the fine print in which she waives the right to appeal or file a post-conviction 28 USC § 2255 petition or a related motion. The agreed-upon sentence, Guideline factors, dismissed counts, and the US Attorney’s promise not to prosecute for anything else are the important questions. Technicalities like waiving appeal and collateral rights, restitution, supervised release… those provisions are usually just so much noise to a defendant who is negotiating away freedom while trying to minimize the pain.
The appellate and collateral attack waiver is not important.
Until it is.
That is, until the parties’ agreement that the Guideline sentence should be between 33-41 months runs into a judge who thinks the statutory maximum sentence of 20 years is more appropriate. The right to appeal such craziness then becomes vitally important. And that’s when the government waves the waiver at the court of appeals, demanding that your appeal be tossed because, after all, you agreed not to appeal.
In 2024, Munson Hunter III signed a plea deal to plead guilty to aiding and abetting wire fraud. The agreement included the standard appeal waiver. The government dismissed nine other counts as part of the package in exchange for Munson’s agreement to a 51-month sentence.
At sentencing, the court accepted the deal, imposing a 51-month sentence. However, concerned that Munson exhibited conduct that suggested some mental issues, the court added a condition that Munson get mental health treatment while on supervised release and take whatever meds the mental health provider prescribed.
Munson was uninterested in spending his supervised release in a drug-induced stupor and tried to appeal, claiming a 5thAmendment right not to be forced to take pills. The 5th Circuit ruled that his appeal waiver barred him from doing so.
Last week, the Supreme Court reversed the Circuit. Writing for the majority, Justice Elena Kagan explained that “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 result was not a watershed moment. After all, eight Circuits already recognize the “miscarriage of justice” exception. But the opinion is notable for the explanation of what constitutes a “miscarriage of justice,” which up to now has been largely an “I can’t define it, but I know it when I see it” standard.
The 8-1 opinion described “miscarriage of justice” as being where
the sentence is marred by the kind of egregious error that would bring the judicial system into disrepute. The error must be obvious—not one a judge could reasonably make. And it must be of the type that would undermine public confidence in the judiciary. Sentencing is a complex affair in our criminal justice system, involving for example the detailed calculation of a Sentencing Guidelines range and the mandatory consideration of multiple sentencing factors. In that endeavor, it is unfortunate but inevitable that mistakes will occur. Such standard-fare errors in misapplying sentencing law cannot cancel an appeal waiver. Were they to do so, the utility of waivers in plea negotiations could plummet: such a provision would have less value to the Government, and so might induce fewer concessions to a defendant. And still more to our point, that kind of standard error is not likely to discredit the judiciary’s commitment to law. But some faults in sentencing can…The point of the miscarriage-of-justice limit, as many appellate courts have properly applied it, is to offer a safety valve for extreme cases—a way out of a waiver when the justice system’s basic integrity is at stake.
Armed with this definition, a well-prepared defendant in many cases may be able to make a compelling showing to get around an appeal waiver. Expect that many cases will follow that include detailed arguments to set aside appeal and post-conviction waivers.
Hunter v. United States, Case No. 24-1063, 2026 US LEXIS 2558 (June 18, 2026)
~ Thomas L. Root

























