Officer follows driver for approximately one (1) mile observing several marked lanes violations. Upon stopping driver has difficulty producing license and registration but denies drinking. Officer detects odor of alcohol and slurred speech. Driver attempts field sobriety tests but claims she is incapable of standing on one leg for any period of time. Defense argues field sobriety tests are not reliable indicators of impairment for this particular driver especially in light of her nervousness and anxiety at roadside. Not guilty verdict following trial.