What is a requirement for creating crime scene sketches?

The requirement for creating crime scene sketches includes using graph paper and a ruler because this method allows for accurate scaling and proportioning of the elements within the sketch. Graph paper provides a structured background, helping investigators maintain proportionality and spatial relationships between objects at the scene. By using a ruler, the investigator can measure distances and represent them precisely in the sketch, ensuring that all details of the crime scene are depicted accurately. This precision is crucial in legal situations where the integrity and fidelity of the evidence documentation may be questioned.

In contrast, other methods might compromise the clarity or accuracy of the sketch, such as the use of colored markers, which might distract from the essential details. Simple plain paper may also lack the structure necessary for precise measurements, and including unnecessary notes can clutter the sketch, detracting from its primary purpose of documenting the spatial arrangement and key features of the scene. Thus, using graph paper and a ruler is the most effective approach to creating accurate and useful crime scene sketches.