MOULTON - A federal grand jury is looking into whether someone in the Lawrence County Sheriff's Office purchased weapons in violation of federal firearms law. Sheriff Grady Rose said Wednesday he was in U.S. District Court in Birmingham last week in connection with the case. He is not believed to be a target of the investigation, sources say. Rose declined to elaborate on the nature of the investigation or what questions he was asked. Grand jury proceedings are not open to the public. "They had subpoenaed some records, and I carried them to Birmingham," Rose said. "That's all I can...