A Warren County Jail inmate had a month added to his sentence after he stabbed another inmate with a nail.The inmate, David Russell Medley, 35, was ordered by General Sessions Judge Bill Locke to serve 30 days of an 11-month, 29-day sentence on the amended count of simple assault. He was originally charged with felony assault. That count could have carried three to six years in prison had he been convicted of the original charge.His sentence comes after correctional officers heard yelling coming from a cell in C-block.“I saw Medley going into C-79 and looked up and heard yelling coming from the cell,” the jailer reported in the facility’s warrant against Medley.