An investigation diary serves mainly to document which three aspects of the investigation?

• A. Final outcomes and court rulings.
• B. Daily progress, actions taken, and important observations.
• C. The investigation's key objectives, timelines, and milestones.
• D. Budgetary and resource allocation notes.

Answer: (B)

An investigation diary is a running log kept during the course of a case that records day-to-day activity. Its main purpose is to document daily progress, actions taken, and important observations so there is a clear, chronological record of how the investigation unfolded. This creates accountability, helps maintain continuity if different team members handle tasks, and provides a reference for reviewing decisions and steps later. It also helps reconstruct the investigation timeline and understand why certain actions were chosen.

Final outcomes and court rulings are results that come after the investigation, not the diary’s purpose. Budgetary and resource notes cover administrative aspects and resource use, which are separate from documenting investigative steps. While a diary might touch on timelines, its primary role isn’t to outline objectives or milestones—that’s planning material—it's to log what happened each day.