To facilitate proper orientation of a crime scene sketch, _____ must be present.

To facilitate proper orientation of a crime scene sketch, the inclusion of an arrow pointing to the north is critical. This arrow provides a reference point which helps to ensure that anyone reviewing the sketch can accurately understand the layout of the scene in relation to the cardinal directions. This orientation is essential for investigators, jurors, or anyone involved in analyzing the crime scene, as it allows for a clear understanding of the spatial relationships between various elements within the scene.

Having an arrow indicating north also aids in the consistency of the investigation documentation, allowing for better communication among law enforcement, legal teams, and any other involved parties. It enables a clearer visualization that can be applied in reports, presentations, and court cases, making it an indispensable part of the crime scene documentation process.