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