What is the purpose of a field sketch at a crash scene?

• A. To explain the crash to the public
• B. To supplement photographs and show spatial relationships
• C. To determine fault
• D. To identify vehicle mechanical failures

Answer: (B)

The essential idea is that a field sketch captures the scene layout in a way photos can’t, by showing where things sit in relation to each other with scale and direction. It complements photographs by providing spatial relationships—distances, angles, and positions of vehicles, debris, skid marks, and landmarks—so investigators can visualize the crash geometry and reconstruct what happened. This is done at the scene to preserve how objects were arranged before any movement or cleanup changes them. It isn’t about explaining the crash to the public, assigning fault, or diagnosing mechanical failures, which require different methods and later analysis.