Accident diagram. While photographs show what happened following an accident, a diagram can show pre-collision movement. (Photo: The Warren Group)

When it comes to diagramming a crash scene, there are several methods to complete the task. Forensic mapping, (locating, positioning and documenting the evidence of a collision scene to scale) is essential to having the answers to the questions, “who, what, where, when and why.” Photographs do a great job of showing what the investigators saw post-collision, yet they lack scale and the ability to describe pre-collision movement. Having a computer-aided diagram (CAD) of the collision scene goes much further than pictures can; here is why.

Figure 1 Figure 1. (Photo: The Warren Group)

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