What element is NOT relevant to an accurate case file?

An accurate case file is essential for documenting the progress and findings of an investigation. The relevant elements typically include the details of the initial report, which provides foundational information about the case, witness interview summaries that capture critical testimonies and observations, and case updates and changes that reflect ongoing developments and adjustments in the investigation.

Logging investigators' and agency's expenses, while important for accounting and budgetary purposes, does not contribute to the case's factual and evidentiary aspects. It relates more to financial tracking rather than the substantive content that forms the core of the case file. Thus, this element is not necessary for an accurate representation of the investigation within the case file. Instead, it focuses on oversight of expenditures rather than the critical investigative data needed to understand and resolve the case.