The NHTSA established eight field sobriety tests to determine drug usage: horizontal 
gaze nystagmus (HGN), pupil reaction, pupil size, standing steadiness, one-leg stand, walk-the-line, finger-to-nose, and pulse rate.
Officers also consider skin marks, apathy, drowsiness, and hyperactivity. Although relatively accurate indicators of drug use, the reliability of the results is contingent upon the training and experience of the office administering tests.
If you have been arrested and charged with a DUI, contact Sacramento DUI lawyer Richard Allaye Chan Jr., for free consultation. Call (916) 446-4400 today.
Allaye Chan Law
1000 G Street, Suite 220
Sacramento, CA 95814
(916) 446-4400
