An officer running radar on Interstate 16 observed a pickup truck in the westbound lane that was approaching at an excessive rate of speed. The vehicle was clocked at 72 miles per hour in a 55 mile-per-hour speed zone. The brake lights came on when the driver passed the officer, who initiated a traffic stop. When the officer approached the truck, he observed a towel lying over the middle console. The driver gave the officer his drivers license, but was unable to produce a valid insurance card. He looked through papers from the glove box and passed over insurance cards that were in plain view. The drivers license the man produced was expired. When the officer ran the drivers information, it came back with a possible warrant from the sheriffs department. At that point, the officer called for backup. After another officer arrived, the driver was asked to step out of his vehicle. As he left the vehicle, the driver had to lean on the truck for support. He turned around and faced the back of his truck, putting his hands on the tailgate. The officer told the man to face him. He asked if he knew his license was expired and the man replied that he did. The officer asked why he would drive on an expired license, and he replied, I apologize for that. The driver was then asked how much hed had to drink and he said, None. The officer asked, None? and the man replied, Nope. The officer observed that the mans eyes were glassy and bloodshot. He asked the driver if he was taking medication. He replied that he was taking an antidepressant, and that he had taken this medication twice. While speaking with the man, the officer noticed an odor of alcohol on his breath. When asked again if hed had anything to drink, the man replied, I had a beer when I left work and thats it. The driver was arrested and charged with driving under the influence.