An unusual robbery in Seville, where the perpetrators rammed a car against a club to steal a slot machine, poses a complex forensic scenario. The scene, with structural damage, vehicle fragments, and impact marks, is ephemeral and must be documented with maximum precision. Here, 3D documentation techniques emerge as key tools to overcome the limitations of traditional photography and manual sketches, capturing the reality of the scene exhaustively and immutably for the investigation.
Photogrammetry and laser scanning: capturing every detail of the impact 🔍
In a case like this, photogrammetry (processing hundreds of photos from different angles) and terrestrial laser scanning would be fundamental. These methods generate a georeferenced point cloud and a high-precision textured 3D model. This allows measuring with exactness the vehicle's deformation, the geometry of the breach in the premises, the distribution of glass shards, and the length of braking or skidding marks. The 3D model enables calculating impact angles, estimated speeds, and trajectories, reconstructing the dynamics of the collision. Unlike traditional methods, this digital asset is interactive, allows virtually returning to the intact scene, and facilitates the clear presentation of evidence in court.
Beyond the scene: virtual reconstruction as expert evidence ⚖️
The true power of the 3D model goes beyond documentation. It becomes the core of an expert virtual reconstruction. Investigators can integrate vehicle data, simulate sequences, and test hypotheses in a controlled environment. This approach objectifies the analysis, minimizing subjective interpretations. For justice, it offers an indisputable visual and metric narrative of the modus operandi, strengthening the case against possible contradictions. 3D technology does not replace the expert, but equips them with the definitive tool to explain what happened.
How can the dynamics of a vehicle's impact against a fixed object be precisely reconstructed and analyzed to determine the feasibility of a documented robbery?
(P.S.: In scene analysis, every scale witness is an anonymous little hero.)