The critical part of any drunk driving investigation is the administration of "field sobriety tests" (FSTs).  These usually consist of a battery of excercises involving balance, coordination and mental agility — and are difficult to perform for even a sober person under ideal conditions (see "Field Sobriety Tests: Designed for Failure?").  Although there are many different tests [...]

Read the complete post at http://www.duiblog.com/2009/10/13/a-fraudulent-field-sobriety-test/