In DWI investigations, what is the main purpose of phase 1?

The primary focus of phase 1 in DWI investigations is to evaluate the need for a traffic stop. During this initial phase, law enforcement officers observe the behavior of the vehicle and its driver to identify any signs of impaired driving that might warrant a stop. In this phase, officers look for specific indicators such as erratic driving patterns, unsafe lane changes, or any traffic violations that suggest that the driver may be a danger to themselves or others on the road.

Understanding the purpose of phase 1 is crucial, as it sets the stage for further investigation. If an officer identifies cause for concern during this phase, they can proceed with the necessary actions, such as pulling the vehicle over for a more detailed assessment. This initial evaluation is critical in ensuring that the traffic stop is both justified and in line with legal procedures.

Subsequent phases of the investigation will involve determining the driver's level of intoxication and conducting field sobriety tests, but these occur only if the officer deems the stop to be warranted based on the observations made during phase 1.