What drawing method is most effective for detailing bullets or blood stains on walls?

The cross projection method is particularly effective for detailing bullets or blood stains on walls because it combines both horizontal and vertical perspectives, enabling a clear representation of the spatial relationship between the evidence on the wall and other elements in the environment. This method provides a comprehensive view where different heights of features and distances from various reference points can be accurately depicted.

When documenting crime scenes, particularly those involving ballistic evidence or blood spatter, it is critical to illustrate not only the location but also the orientation of such evidence relative to the ground and other salient features of the scene. The cross projection technique achieves this by allowing the investigator to lay out a two-dimensional view that represents three-dimensional data, making it ideal for a thorough interpretation of the scene's dynamics.

In contrast, other methods such as floor plan views might not adequately capture the vertical aspects of evidence on walls, while exploded views are typically used for mechanical drawings rather than crime scene documentation. Elevation drawings, on the other hand, focus mainly on the vertical dimensions but may lack the comprehensive perspective needed to connect various evidence points effectively. Thus, the choice of cross projection for this particular task is justified, as it allows for a richer, more informative representation of the crime scene elements involved.