How should impressions like footprints be documented at a crime scene?

Documenting impressions such as footprints at a crime scene should include a combination of photographs and casts, as this method ensures a comprehensive record of the evidence. Photographs capture the appearance of the impression in situ, providing context that can depict its relationship to other evidence, the environment, and any relevant objects nearby. This visual evidence is crucial for later analysis and can be compelling in court presentations.

Additionally, creating a cast of the footprint allows for a three-dimensional representation of the impression, which can capture details that photographs alone might miss, such as depth and wear patterns. This method not only preserves the physical evidence but also allows for analysis of the tread design and size, which can link a suspect to the scene.

Using only a written description lacks the visual and physical representation needed for thorough documentation. Relying solely on video recording would omit the critical aspect of casting, while employing a laser scanner, although technologically advanced, may not always be practical or necessary for every crime scene, especially when more straightforward methods yield effective results. Hence, the combination of photographs and casting represents the most effective strategy for documenting impressions like footprints.