LAS VEGAS (AP) — A rancher's son now campaigning as an independent for Nevada governor filed a lawsuit Wednesday against current and former U.S. government officials, alleging malicious prosecution after a 2014 armed standoff with federal land agents.

Ryan Bundy and his father, Cliven Bundy, said outside the U.S. courthouse in Las Vegas that prosecutors tried to wrongfully convict them for peacefully stopping a roundup of Bundy cattle by U.S. authorities from federal land near the family ranch in Bunkerville.

"The federal government unlawfully retaliated against my family for defending our rig...