Which of the following is NOT a commonly used patrol unit position during an unknown risk traffic stop?

In a situation involving an unknown risk traffic stop, the primary goal for officers is to position their patrol vehicles in a way that maximizes safety and control over the interaction with the vehicle being stopped. The diagonal position is generally used when the risk is assessed as higher or when officers anticipate potential threats. By positioning the patrol unit diagonally, it provides greater coverage and a tactical advantage, making it suitable for higher-risk situations.

On the other hand, the other positions—such as in-line, offset, and angle—are more specifically employed during lower-risk stops. The in-line position aligns the patrol vehicle directly behind the stopped vehicle, providing clarity and minimizing exposure for officers. The offset position places the patrol unit to the side, which allows the officer to maintain a tactical advantage while minimizing their exposure, and the angle position allows for better visibility while still offering some cover.

Thus, the diagonal position is less commonly associated with unknown risk traffic stops, which is why it stands out as the one that is not typically utilized in these scenarios.