The "typical" DWI case usually begins with a police officer pulling someone over for a traffic violation such as speeding, swerving, or even something as serious as a traffic accident.

DWI police officers usually will then "notice" that the driver has an odor of alcohol on their breath, bloodshot and watery eyes, and slurred speech. You are asked to step out of their car to perform field sobriety tests. You are now a suspect in a DWI investigation.

Normally, three roadside field sobriety tests are given: 1) The Horizontal Gaze Nystagmus test, 2) the Walk-and-Turn test, and 3) the One...