Frederick County Sheriff Charles Austin Jenkins is facing charges after the Department of Justice said he unlawfully purchased machine guns for years. A sheriff and a local firearms dealer in Frederick County, Maryland, have been indicted on federal charges for their roles in a scheme to illegally acquire machine guns so they could be rented out for profit, federal prosecutors announced. A federal grand jury indicted Frederick County Sheriff Charles Austin Jenkins, 66, and Robert Justin Krop, 36, on charges of conspiracy and false statements to acquire machine guns, the US Department of Justice said in a Wednesday news release. Krop, who owns firearms-related businesses in the county, is also charged with illegal possession of seven machine guns, the agency said.