Should evidence markers be placed before taking an overall photo of a crime scene?

Placing evidence markers before taking an overall photo of a crime scene is not standard practice, as the primary purpose of an overall photograph is to capture the scene in its original condition, "as is." This allows investigators to document the crime scene exactly as it was found, preserving the context and positioning of all elements within it.

When markers are placed, they can alter the scene and may obscure or change the relationship of items within the scene, which could affect the interpretation of the evidence later on. Thus, capturing the scene without any alterations from evidence markers provides a clearer foundation for analysis and aids in maintaining the integrity of the evidence. After the overall photographs are taken, markers can be placed to assist in the detailed documentation and analysis of specific pieces of evidence thereafter. This approach allows the investigation to maintain the original context while also ensuring that important evidence is clearly identified for later examination.