What is phase 1 in the context of a DWI investigation?

Phase 1 of a DWI investigation refers to the stage when the vehicle is in motion. This phase is critical because it allows law enforcement officers to observe the driving behavior that may indicate impairment. During this phase, officers look for various signs such as swerving, speeding, or erratic movements that could suggest the driver is under the influence of alcohol or drugs.

Recognizing the condition of the vehicle in motion is essential for determining whether to initiate a traffic stop. It serves as the basis for the officer's reasonable suspicion that can lead to further investigation. The observations made during this phase can provide key information and justification for the officer's actions in subsequent phases of the DWI investigation, such as personal contact and pre-arrest screening.

Each phase is interconnected, but the initial observations made while the vehicle is in motion lay the groundwork for any subsequent actions taken by law enforcement.