In the Supreme Court of the United States, Julius Cornelius Rosemond, petitioner, v. United States, respondent : on writ of certiorari to the United States Court of Appeals for the Tenth Circuit : brief amicus curiae of Gun Owners Foundation, U.S. Justice Foundation, Gun Owners of America, Inc., [and 2 others] in support of petitioner /

At issue is whether the federal crime of aiding and abetting the use of firearms requires proof of defendant's facilitation or encouragment in its use, or only the advance knowledge that an accomplice has a firearm.