A man caught trying to smuggle a knife into Warren County Jail will serve a year behind bars.The man, Clifford Keller, 29, has entered guilty pleas to a host of charges before Circuit Court Judge Bart Stanley. The charges included second-offense driving on a revoked license, failure to appear in court, and bringing contraband into a penal institution. As part of his plea bargain, Keller will serve one year of a six-year sentence and must pay $2,000 plus costs and perform 100 hours public service work.Keller was charged after the discovery was made while he was being dressed out by jailers in preparation of being placed in the jail’s general population.