South Carolina DUI Lawyers Can I be Arrested for Failing an FST? Field sobriety tests (FSTs) were created to help law enforcement gauge the relative sobriety or intoxication of a driver, and cannot be used to determine blood alcohol level. However, a police officer who has pulled a suspicious motorist or who is working a sobriety checkpoint can request a battery of field sobriety tests in determining probable cause of an arrest and the use of an evidentiary alcohol test. If you’ve been arrested and charged with a DUI based on your … [Read more...]