What are the options an officer has at each phase of detection?

The correct answer emphasizes the practical decision-making process that an officer goes through at each phase of detection during a traffic stop or an investigation. The options of "Yes, Do it now; Wait; No" reflect a structured approach where an officer can decide to take immediate action, pause for further observation or consideration, or to refrain from taking action altogether.

In the context of HGN detection, when an officer notices signs of impairment, they may decide that it is appropriate to proceed with a field sobriety test, hence the "Yes, Do it now." If the officer needs more time to observe the suspect's behavior or to gather additional information, the "Wait" option would allow for that pause in action. Finally, if observations do not support the suspicion of impairment, the officer can choose "No," indicating that no further action is required.

This structured decision-making process is critical for ensuring that officers follow appropriate protocols and remain within legal guidelines during their assessments. Each phase allows for a clear path of action based on observed evidence and established criteria.