Shot or buckshot? The evidentiary value of ballistic and forensic medical expertise in a case of homicide and personal injury.

This case highlights the crucial role of forensic sciences in reconstructing the dynamics of a firearms-related case involving two victims. G.D. died at the scene after being struck by three shots from a 12-gauge firearm loaded with 11/0 buckshot, causing massive bilateral hemothorax and aortic laceration. Autopsy revealed multiple pellet wounds consistent with this ammunition. C.D. was hospitalized with multiple injuries, including three entry wounds to each shoulder and grazing wounds to the left temporal region and right thoracic wall. Examination of seized evidence-cartridge cases, an unexploded cartridge, wads, and pellets-confirmed that all injuries were compatible with the same weapon and ammunition type. Ballistic analysis demonstrated that all cartridge cases were fired from a single firearm. G.D.'s injuries corresponded to shots from 3 to 7 m, while C.D. was struck by two shots from 10 to 12 m. Initial hypotheses suggesting the use of different weapons (birdshot and buckshot) were not supported; metallic fragments in C.D.'s temporal region were identified as fragments from a single buckshot pellet. Shooting distances were estimated based on pellet spread and wound patterns and confirmed through experimental test-firing. In conclusion, the investigation confirmed that both the fatal injuries of G.D. and the non-fatal wounds of C.D. resulted from a single 12-gauge firearm using 11/0 buckshot. This case underscores the importance of a combined medico-legal and ballistic approach for accurately evaluating firearm injuries and reconstructing shooting events.