A proper crime scene diagram should indicate:

A proper crime scene diagram is a crucial component of the investigation process as it provides a visual representation of the crime scene and the spatial relationships between various elements. Including measurements between evidential components is vital because it allows for an accurate reconstruction of the crime scene. This information can be critical in analyzing how the crime occurred, the movement of individuals involved, and how evidence relates to specific locations within the scene.

Detailed measurements can also be used in court to support the findings of the investigators, helping to provide a clear context for the evidence collected. This accurate documentation ensures that the integrity of the crime scene is maintained and that all details are recorded systematically, which aids in further investigations and legal proceedings.

In contrast, while the identity of the officer in charge, the estimated time of criminal activity, and the direction from which suspects entered might be relevant to an investigation, they do not contribute to the spatial understanding of the crime scene in the same way that measurements between evidential components do. These other elements can be documented elsewhere in the investigation reports or case files but are not as critical to the diagram itself.