GREENVILLE, South Carolina, Feb. 15 -- The office of the U.S. Attorney for the District of South Carolina issued the following news release: A federal grand injury returned a two-count indictment against Alvin Bernard Parks, 42, in connection with sending a threatening letter to a federal judge. According to court documents, Parks is alleged to have sent a letter to a specifically named United States District Court Judge for the District of South Carolina. The handwritten letter contained thre  more