SFST's DUI Flashcards
Colorado Field Validation Study of SFST
86% correct arrest/release decision based on three SFST’s
93% of those arrested had a BAC of 0.05 or higher
Florida Field Validation study of SFST
95% correct arrest decisions based on the three SFST’s
Validated SFST’s at 0.08 BAC and above
San Diego Field Validation Study of SFST
91% correct arrest decision for 0.08 BAC and above using three SFST’s
HGN is still the most reliable of three SFST’s and supports arrest decisions at 0.08 BAC
Horizontal Gaze Nystagmus (HGN)
Involuntary jerking of eyes, occurring as eyes gaze to the SIDE
What are the 3 Gaze Nystagmus
Horizontal
Vertical
Resting
Vertical Gaze Nystagmus
Involuntary jerking of eyes (Up and down)
Resting Nystagmus
Jerking of eyes as they look straight ahead
HGN Medical Impairment assessment
Equal pupil size
Resting Nystagmus
Equal tracking
The three clues to HGN testing
Lack of smooth pursuit
Distinct and sustained nystagmus at maximum deviation
Onset of nystagmus prior to 45 degrees
When conducting HGN testing make sure to remove glasses and hats
Position for finger or other stimulant for HGN testing
12-15 inches from the nose at about eye level
Clues for HGN testing
look for all three of these clues in each eye for a total of 6 clues:
Lack of smooth pursuit
Distinct and sustained nystagmus at maximum deviation
Onset of nystagmus prior to 45 degrees
How many clues need to be found in the HGN test to indicate BAC is 0.08
4 or more
This is 88% accurate
The walk and turn test is a _______ test
Divided attention test.
Mental task and physical task
What two stages are in the walk and turn test
Instruction stage
Walking stage
How many instruction stage clues are their for the walk and turn test
2
Cannot keep balance while listening to instructions
Starts to soon
How many walking stage clues are their for the Walking stage of the walk and turn test
6
-Stops while walking
-Does not touch heel to toe
-Steps off the line
-Uses arm(s) to balance
Improper turn
Incorrect number of steps
How many total clues are their for the Walk and turn test
8
How many clues need to found in the walk and turn test to indicate BAC is 0.08
2 or more clues
(79% accurate)
The One leg stand is a _____ test
Divided attention test
-Mental task and physical task
what stages are in the One leg stand test
Instruction stage
Balance and counting stage
One leg stand test clues
Sways while balancing
Use arm(s) to balance
Hopping
Puts foot down
How many clues can be found in the One leg stand test
4
How many clues need to be found in the One leg stand test to indicate BAC is 0.08
2 or more
(83% accurate)
Questions that divide attention
What day is it?
where are you coming from?
-be alert for the driver who:
- Ignores question
-supplies incorrect answer
Phase one
Vehicle in motion
Most common and reliable indicators of DWI
Problems in maintaining proper lane position
Speed and breaking problems
Vigilance problems
Judgment problems
Motorcycle DUI Detection
Drifting during turn or curve
trouble with dismount/balance at a stop
turning problems
inattentive to surroundings
inappropriate or unusual behavior
weaving
recklessness
following to closely
running stop light or sign
evasion
traveling wrong way
erratic movements while going straight
Vehicle in motion cues
What do you see?
-Moving violation
-Equipment violation
-Other violation
-Unusual operation
-Anything else
How is BAC measured
BAC is the number of grams of alcohol found in 100 milliliiters of the persons blood
Distillation
Fermented beverage is boiled at a controlled temp to extract and concentrate the ethanol fumes
Fermentation process
Sugar + yeast- oxygen=carbon dioxide+ alcohol
Common symptoms of alcohol influence
0.02=impaired judgement
0.05=impaired vision
0.08=poor coordination
0.10= slowed reaction
0.15= substantial impairment
Two aproaches for stopping DUIS
Deterrence
Prevention
Actual physical control
Being in the drivers position of a motor vehicle withe the motor running OR with the vehicle moving
Do your have the right to an attorney before submitting to evidentiary testing?
NO
what is the civil divers license suspension for 1st time refusal?
1 year $250
second time refusal within 2 years punishment
2 years $250
What is the civil driver’s license suspension (ALS) for 1st time failure
90 days
The ALS form only applies to the civil license suspension not the criminal case
Underage DUI 1st off
$1000, 90 to 1 year suspension, alcohol evaluation
Excessive DUI 1st
10 days to 1 year in jail, $2000, 1 year suspension
DUI 1st
6 months in jail, $1000, 90- 180 day suspension. The 30 days are absolute
Aggravated DUI
15 years in prison, $5000 fine, 1-5 year suspension, ignition interlock, restitution
Private property
Real property not owned by the government
What is private property open to the public
Real property not owned by the government, but is available for vehicular traffic or parking with permission of the owner
Phase two:
Personal contact
-What do you see
-What do you hear
-What do you smell
Phase one task one
Initial observation of vehicle operation
Phase one task two
Observation of the stop
Phase Two: Task one
Face to face observation and interview of suspect
Phase two
Personal Contact
ALS
Alcohol License Suspension
Reasons we use HGN
Reliable
Involuntary
Noticeable
Pertains to CNS Depressants, inhalants, and dissociative anesthetics cause HGN
Types of evidence
Physical
Established facts
Illustrative
Demonstrative
Written documentation
Testimony
What approximate percentage of fatal crashes involve drivers who have been drinking
28%
Post arrest evidence
Breath test
On any typical weekend night, approximately what percentage of cars are driven by persons who are DWI?
10% or more
About how many times does the average DWI violator drive intoxicated before arrest?
About 80
An alcohol-related crash at night is more likely to result in death than is a non alcohol related crash.
How many more times likely?
3 or 3.3
What is the definition of DWI detection
