A Lehigh County driver is facing a charge of driving under the influence (DUI) following an incident that occurred about 2:09 a.m. on Dec. 22, 2012, along Tilghman St., near Snowdrift Road, in Upper Macungie Township. Troopers said Samantha Lynn Koons, of Breinigsville, was stopped for a traffic violation and found to be under the influence and placed under arrest for suspicion of DUI.