Depending on the type of truck accident, the layout of the scene, and the types of facts or models that need further evidence and analysis to develop (or disprove), forensic analysts may gather evidence such as:
- Photographs of the scene. Pictures can show factors like the weather, the layout of the road, the location of signs and barriers, skid marks, and the nature and final position of accident debris.
- Video of the collision, which is more common at intersections and other places with traffic cameras.
- Measurements of the scene. Analysis of skid marks, damage to road barriers, and other features can help experts estimate things like speed and force of impact.
- Paint, glass, and other debris samples. This evidence offers indirect insight into things like speed and angle of impact. In a hit and run, such samples can also help identify a vehicle.
- Eyewitness testimony. Firsthand accounts of what happened before, during and after the crash – particularly when collected shortly after the incident – offer analysts clues. This testimony, for instance, can narrow the possible explanations for how the crash occurred and help analysts focus on the most likely scenarios.
- Event data recorder information. Many large trucks come equipped with a “black box” that records data, such as speed, direction, and when brakes were applied.
- 3D scans. These tools offer investigators another way to model the accident scene and recreate the forces and conditions involved.