PIERRE, S.D. (AP) — Attorney General Marty Jackley says South Dakota has joined with 26 other states in filing a friend-of-the-court brief in a U.S. Supreme Court case involving the sale of guns.

Jackley says South Dakota allows private gun sales between law abiding citizens. He says the brief opposes the federal government's attempt to expand federal law to prevent such sales and prosecute lawful gun owners who buy firearms and sell them to others who can legally own guns.

The brief was filed in a case involving a former Virginia police officer who bought a gun and then sold it to his uncle, a Pennsylvania man who could legally own firearms. Jackley says federal authorities prosecuted the Virginia man on the grounds that he made false statements on the gun purchase form.

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