Petitioner Calvin Smith was indicted for crimes connected to his role in an organization that distributed cocaine, crack cocaine, heroin, and marijuana in Washington, D.C., for about a decade. The 158-count indictment charged Smith and 16 alleged co-conspirators with conspiring to run, and actually running, an illegal drug business, as well as with committing acts of violence, including 31 murders, to further their goals. Smith was tried alongside five codefendants in the United States District Court for the District of Columbia.
A jury convicted him of conspiracy to distribute narcotics and to possess narcotics with the intent to distribute them, in violation of 21 U.S.C. § 846, Racketeer Influenced and Corrupt Organizations Act conspiracy in violation of 18 U.S.C. § 1962(d), murder in connection with a continuing criminal enterprise, and four counts of murder while armed. Before trial, Smith moved to dismiss the conspiracy counts as barred by the 5-year statute of limitations under 18 U.S.C. § 3282. He had spent the last six years of the charged conspiracies in prison for a felony conviction. The court denied his motion and Smith renewed his statute-of-limitations defense at trial.
In the final jury charge, the court instructed the jury to convict Smith of each conspiracy count if the Government had proved beyond a reasonable doubt that the conspiracies existed, that Smith was a member of those conspiracies, and that the conspiracies continued in existence within five years before the indictment. After it began deliberations, the jury asked the court what to do in the event that a defendant withdrew from the conspiracies outside the five-year limitations period. Over the defense's objection, the court instructed the jury that once the government has proven that a defendant was a member of a conspiracy, the burden is on the defendant to prove withdrawal from a conspiracy by a preponderance of the evidence.
The jury then convicted Smith of the conspiracy crimes. As relevant here, the Court of Appeals for the District of Columbia Circuit affirmed Smith's conspiracy convictions. The Supreme Court granted certiorari to review the question of which party bears the burden of proving or disproving a defense of withdrawal prior to the limitations period.