One of the basic tools in DUI cases in Nashville , Franklin , And Gallatin are the Standardized Field Sobriety Tests. What is the definition ?

Standardized Field Sobriety Tests are a battery of three tests , Horizontal Gaze Nystagmus ,Walk and Turn , and One Leg Stand , administered and evaluated in a standardized manner to obtain validated indicators of impairment based research by the National Highway Traffic  and safety Administration. (NHSTA).

By the way , the photo above is not how you do it correctly. This guy is going to jail.