Supreme Court of the United States April 4, 2005, 03-9685 (Johnson v. United States)

Justice Souter

delivered the opinion of the Court.

The question here is when the 1-year statute of limitations in 28 U. S. C. § 2255, ¶ 6(4), begins to run in a case of a prisoner’s collateral attack on his federal sentence on the ground that a state conviction used to enhance that sentence has since been vacated.