Two men arrested in a rolling meth lab incident that shut down Pine Street Elementary and the Rockdale County Courthouse last October have pled guilty in Rockdale County Superior Court. Both entered their guilty pleas before Judge Sidney Nation on Tuesday. John David Gray, 39, of Conyers, was charged with counts of Violation of the Georgia Controlled Substances Act, Possession of Tools for Commission of a Crime, second degree forgery, possession and use of drug related objects, and driving an unsafe and improperly equipped vehicle.