October 29, 2015

WI Detection and Standardized Field Sobriety Testing Session 7 – Phase Three: Pre-Arrest Screening PBT:

DWI Detection and Standardized Field Sobriety Testing
Session 7 – Phase Three: Pre-Arrest Screening
PBT:
Helps corroborate all other evidence
Helps confirm your judgment as to
whether the driver is impaired
Usually results cannot be introduced as
evidence against the driver in court*
* State laws vary in this regard
Preliminary Breath Test (PBT)
7-5
Preliminary Breath Test
The preliminary breath test (PBT) can help to corroborate all other evidence and to
confirm your judgment as to whether the subject is impaired. Usually PBT results cannot
be introduced as evidence against the subject in court; however, state laws vary in this
regard.
DWI Detection and Standardized Field Sobriety Testing
Session 7 – Phase Three: Pre-Arrest Screening
DWI detection process concludes with
the arrest decision
This decision is based on all evidence
obtained during all three detection
phases:
Observation of vehicle in motion and
during the stopping sequence
Face to face observation of driver and
driver’s vehicle exit
Pre-arrest screening
The Arrest Decision
7-6
The Arrest Decision
The DWI detection process concludes with the arrest decision. This decision is based
on all of the evidence you have obtained during all three detection phases: on
observation of the vehicle in motion and during the stopping sequence; on face to face
observation of the subject and the subject’s exit from the vehicle; and, pre-arrest
screening.
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HS 178 R5/13 4 of 26Source: DWI Detection and
Standardized Field
Sobriety Testing
March 2013 Edition

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