Final answer:
Detailed narrative descriptions can assist the investigator in evaluating or emphasizing a point for a photograph or sketch.
Step-by-step explanation:
Detailed narrative descriptions can indeed assist the investigator in evaluating or emphasizing a point for a photograph or sketch. By using narrative techniques, such as storytelling and reporting, an investigator can provide supporting facts and answer questions about who, what, when, where, why, and how. These descriptions can enhance the understanding and interpretation of the image, helping readers visualize the subject more effectively.