3D technology has burst into Colombian courts to challenge a final conviction. A digital recreation of the murder of model María Mercedes Gnecco, which occurred in 2015 in San Andrés, has uncovered critical anomalies at the crime scene. Computational forensic analysis, based on photogrammetry and ballistic simulation, suggests that the version presented by the prosecution does not match the physics of the evidence, opening the door to a possible review of the case. ⚖️
Data capture and ballistic simulation: the forensic pipeline 🔬
The technical process began with digitizing the apartment using laser scanning and high-resolution photogrammetry. A point cloud with millimeter precision was generated, allowing the exact geometry of the scene to be modeled. On this base model, computer forensics experts applied a ballistic trajectory simulation engine. By inputting data from the original ballistic reports (caliber, entry and exit angle), the software revealed that the trajectory of the projectile that killed Gnecco could not have originated from the defendant's position as described at trial. Additionally, a computational fluid dynamics (CFD) analysis was performed on the bloodstains. The spatter patterns, when recreated in the 3D environment, showed a dispersion incompatible with a single shooter. The distribution of the drops suggests that the body was moved after the first impact, altering the scene before the arrival of authorities.
The legal impact of digital evidence 🧑⚖️
Digital forensic experts consulted point out that this reconstruction not only contradicts the defendant's testimony but also questions the work of the original crime scene investigators. The defense has presented the interactive model as key evidence to request a mistrial. The judge must assess whether this evidence meets the Daubert standard, which requires that the methodology be accepted by the scientific community. If accepted, the 3D recreation could not only free John Jairo Rojas but also redefine the use of forensic visualization in the Colombian judicial system, demonstrating that pixels can be more eloquent than testimonies.
How would you integrate this finding into an existing forensic pipeline?