The Carson City Sheriff’s Office on Thursday arrested a Sparks man for an accidental discharge of a rifle he carried Saturday as a Black Lives Matter protest wound down in downtown Carson City. Grant Ensenat McBeth, 22, was booked on a misdemeanor charge of negligent discharge fo a firearm in public with bail set at $500. Detectives arrested McBeth at his Sparks home without incident. He had been carrying an AK-47 assault rifle.