Which of the following is NOT a method used for crime scene sketching?

Crime scene sketching is a crucial element in criminal investigations as it provides a visual representation of the scene, which can be used in court and for reference throughout the investigation process. The correct answer identifies "observation" as not being a method used for crime scene sketching.

Observation refers to the act of watching, noticing, or perceiving events or details at the crime scene. While it is an essential skill for law enforcement and forensic professionals, particularly for understanding the context and dynamics of a scene, it does not constitute a formal method of sketching the scene itself. Sketching requires specific techniques to accurately depict the spatial relationships and layout of evidence.

In contrast, methods such as cross projection, triangulation, and coordinate involve systematic approaches to measure and represent the physical layout of the crime scene. Cross projection involves representing vertical and horizontal surfaces in the same sketch, allowing for an understanding of the relationship between different levels of the scene. Triangulation is a method for determining the location of an item of evidence by measuring it from two fixed points, creating a precise representation. The coordinate method involves using a grid system to plot points on a graph, ensuring accuracy in the positioning of evidence and details. These methods provide structure and reliability to the sketches