Which tasks are mandated in Phase 3 of evidence gathering in DWI investigations?

Phase 3 of evidence gathering in Driving While Intoxicated (DWI) investigations focuses on the crucial tasks that help determine if a driver is under the influence of alcohol or drugs. In this phase, both the Preliminary Breath Test (PBT) and Standardized Field Sobriety Tests (SFSTs) are utilized to gather empirical evidence regarding the suspect's level of impairment.

The PBT allows officers to assess the alcohol concentration in a suspect's breath, which can be a key factor in determining impairment. Alongside this, the SFSTs, including tasks such as the Horizontal Gaze Nystagmus test, Walk-and-Turn test, and One-Leg Stand test, are designed to evaluate a suspect's physical coordination and cognitive function in a standardized manner. These tests have been scientifically validated and provide consistent indicators of impairment.

The activities of initial observations, documentation, and field notes are important but serve different purposes within the investigative process. Initial observations help form the basis for a stop, while documentation and field notes provide a record of the incident. However, in the context of Phase 3, the focus is specifically on conducting the PBT and SFSTs as a direct method for gathering evidence related to impairment. Therefore, these