Sheriff Jackie Matheny got one step closer to a sixth term of office Tuesday night after besting one of his former investigators, Bobby Edwards, and carrying all but one precinct on his way to victory.Matheny took the Democratic nomination for Warren County Sheriff by defeating Edwards by a count of 3,477 to 1,988. The margin represents a winning percentage of 64 to 36 percent. It marks the third election in which Matheny has won 64 to 36 percent.