U.S. Sup. Ct.
11-9307

A federal court of appeals normally will not correct a legal error made in a criminal trial unless the defendant first brought the error to the trial court’s attention. United States v. Olano, 507 U. S. 725, 731. But Federal Rule of Criminal Procedure 52(b) provides an exception, permitting “[a] plain error that affects substantial rights [to] be considered even though it was not brought to the [trial] court’s attention.”