Final answer:
Dean should begin photographing the crime scene outside, documenting the surroundings and paths leading to the scene. He then works his way inside, capturing wide shots before taking mid-range and close-up photographs of individual pieces of evidence.
Step-by-step explanation:
Dean, as a crime scene photographer, should follow a systematic approach when photographing a crime scene to ensure that all evidence is captured in its untouched state. He should begin outside, capturing the overall surroundings and approach to the scene, which may include paths, entrances, and exits. Dean should then work his way inside, documenting each room and area, and eventually focusing on individual pieces of evidence. He should photograph from a wide perspective before moving on to mid-range shots, and finally, take close-up shots with and without a scale indicator to show the size of the evidence. This methodical process ensures that the context and spatial relationships are preserved in the photographs, which can be critical during investigation and prosecution.