Why is it important to conduct background checks during an investigation?

Conducting background checks during an investigation serves multiple critical purposes, with the primary focus being on uncovering relevant past behavior or criminal history that may impact the case. Understanding a person's background allows investigators to identify patterns of behavior, past incidents, or previous interactions with law enforcement that could be pertinent to the current investigation. This information can help establish motives, connections, or credibility related to the case.

While tracking witness availability, ensuring the trustworthiness of witnesses, and gauging public opinion about a suspect are also important aspects of an investigation, they don't address the foundational need of understanding how a suspect's or witness's past could influence the current situation. The insights gained from background checks can significantly alter the direction of an investigation, inform legal strategy, and help in making informed decisions about how to proceed. Thus, the focus on uncovering past behavior or criminal history is essential to ensure a thorough and effective investigation.