What tasks are included in the evidence gathering for Phase 1 of a DWI investigation?

In Phase 1 of a DWI investigation, the focus is on the initial observations of the vehicle in motion. This involves monitoring the driving behavior of the vehicle, which can reveal signs of impairment such as erratic lane changes, speeding, or sudden stops. Recognizing these behaviors early in the investigation is crucial for establishing probable cause and determining whether further action is warranted, such as conducting field sobriety tests.

The other tasks mentioned, although part of the broader investigation process, occur in later phases. For example, exit observation and driver interviews are typically addressed in Phase 2, where the officer engages directly with the driver after stopping the vehicle. Sobriety tests and breathalyzer assessments are conducted in Phase 3, after initial indications of impairment have been established. Background checks might be relevant at any point but do not directly relate to the immediate observations of the vehicle in motion that characterize Phase 1. Therefore, focusing on the driving behavior sets the foundation for the subsequent steps in the DWI investigation.