Field Sobriety Tests: No Warrant
Police officers test for impairment in driving under the influence cases with a number of different tests. These include physical field sobriety tests - testing for horizontal gaze nystagmus, walk a straight line, heel to toe, stand on one leg, touch your nose, finger count, counting backwards, alphabet, 30-second time estimate, and hand pat. Field sobriety tests often involve several of these observational tests. The "suspect" is judged on appearance, following instructions and test performance.