Standard Field Sobriety Testing, or SFSTs consists of 3 tests
HORIZONTAL GAZE NYSTAGMUS (HGN) is the involuntary jerking of the eyes when gazing from side to side usually caused by drugs, alcohol or medical condition.
Consists of 3 Possible Test Clues:
1. lack of smooth pursuit
2. distinct and sustained nystagmus at maximum deviation
3. onset of nystagmus prior to 45 degrees
WALK & TURN
Consists of 8 Possible Test Clues:
1. cannot keep balance
2. starts too soon
3. stops while walking
4. does not touch heal to toe
5. steps off line
6. uses arms to balance
7. improper turn
8. incorrect number of steps
ONE LEG STAND
Consists of 4 Possible Test Clues:
1. sways while balancing
2. uses arms to balance
3. hopping
4. puts foot down
***SOURCE Standard Filed Sobriety Testing Training Manuel
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