What is NOT a primary function of crime scene photography?

The correct answer is D, "Assisting in witness treatment," because this function does not align with the primary purpose of crime scene photography. Crime scene photography focuses on capturing and documenting the physical aspects of a crime scene through images. The main goals are to create a visual record of the scene, document evidence locations, and establish timelines based on the photographs taken.

Establishing timelines involves capturing images that show the sequence of events or the state of the scene at specific times. Documenting evidence locations means taking photographs that indicate where evidence is situated within the scene, which is crucial for investigations and future court proceedings. Creating a visual record serves to provide a detailed representation of the scene for law enforcement officials, investigators, and legal professionals.

Witness treatment, while an essential aspect of investigations, relates more to the interactions and support provided to individuals who have observed a crime rather than the documentation of the scene itself. Hence, assisting in witness treatment is not a primary function of crime scene photography.