Whether you've lived in Tennessee all your life, or have just recently migrated here, you're probably somewhat aware of state laws regarding various topics. Perhaps police have pulled you over a time or two for driving a few miles over a posted speed limit or driving with a broken taillight. If your car has ever drifted a bit too close to the yellow line, you may have wound up in a traffic stop on suspicion of drunk driving.
After submitting to a Breathalyzer and a few field sobriety tests, you may have been able to resolve your situation. The experience likely made you at least vaguely familiar with the criminal justice system. It can be a real game-changer, however, if police charge you with a serious offense.