Whether an unpreserved claim that the Government breached a plea agreement is governed by Federal Rule of Criminal Procedure 52(b)'s plain-error standard.
Holding
Yes. A defendant who fails to object in the district court to the Government's breach of a plea agreement forfeits the claim, and an appellate court reviews it under Rule 52(b)'s ordinary four-part plain-error test.
Reasoning
The contemporaneous-objection rule generally requires a party to identify an alleged error when the trial court can address it. Rule 51(b) explains how to preserve a claim; Rule 52(b) provides the limited route for reviewing an unpreserved error. Nothing in Rule 52(b) excludes plea-agreement breaches from its broad terms.
Under United States v. Olano, plain-error review requires the defendant to show an error that was not affirmatively waived, that the error was clear or obvious, and that it affected substantial rights—ordinarily meaning it affected the outcome. Even then, an appellate court may correct the error only if it seriously affects the fairness, integrity, or public reputation of judicial proceedings.
A Government breach of a plea agreement does not retroactively make an otherwise knowing and voluntary guilty plea invalid. Plea agreements resemble contracts: breach gives the injured party a right to seek a remedy, potentially including plea withdrawal or specific performance, but does not establish that the agreement was never valid. The claim here was forfeited by counsel's failure to object, not waived by an intentional relinquishment of rights, so cases requiring certain waivers to be personal and voluntary did not control.
Santobello v. New York did not create an exception to plain-error review. The defendant in Santobello promptly objected, so that case concerned the remedy for a preserved breach rather than the standard of review for a forfeited one. Harmless-error principles and plain-error principles answer different questions.
Requiring a timely objection serves important practical functions. It prevents defendants from withholding an objection while waiting to see whether the sentence is satisfactory; allows the district court to determine whether a breach occurred; may permit the prosecutor to cure an inadvertent breach; and can allow the court to provide an immediate remedy without the expense and delay of appeal.