What importance does interviewing witnesses play in HSI investigations?

Interviewing witnesses plays a crucial role in HSI investigations as it helps in accumulating different perspectives related to the case. Each witness may provide unique insights, observations, or facts that can contribute to the overall understanding of the incident or investigation at hand. These perspectives can help build a more comprehensive narrative, identify potential leads, and corroborate other evidence gathered through various means. The information gathered from witnesses not only aids in shaping the direction of the investigation but also assists in assessing the credibility of other evidence and sources.

Collecting public opinion, as suggested in one of the other options, may be important in some contexts but does not serve the primary investigative goals of HSI. Additionally, while interviewing witnesses can ultimately support making arrests, it is not solely about that outcome; it primarily enriches the investigative process by providing context and clarity. Furthermore, although interviewing witnesses can be necessary in many investigations, it is not a strict requirement for all cases, as some situations may involve different investigative strategies or focus on other aspects of the evidence available.