Possibilities to Solve Scientific and Practical Tasks Using Results of Comparative Analysis of Gunshot Residues Formed when Shooting from Modern Models of Pistols Chambered for 9 x 19 mm (Luger)

The article provides substantiation for the pattern of occurrence of similar parameters of a shot phenomenon and characteristics of a gunshot residues when shooting from different models of pistols chambered for 9x19 mm (Luger). The reason for this pattern is the constructive similarity of the 9 mm pistol models selected for examination: Lebedev pistol (PLK), Yarygin pistol (PY), GSh-18 pistol, Glock 17 pistol, SIG Sauer P229 pistol, CZ-75 pistol as well as the use of one cartridge when shooting - 9 x 19 mm (Luger). On the same shooting distances, different models of pistols form the gunshot residues similar in features of presence, shape, size and the degree of their expression and pattern. Based on this fact, a proposal was made to use this consistent pattern to solve the tasks arising in investigative and expert practice and related to appointment and production of forensic examinations. In the absence of reference information on the gunshot residues caused by shooting from the same gun model which was used in crime commission, the author allows an investigator and a forensic expert to refer to the background data from published literature on another constructively similar gun model and its gunshot residues. The comparison results obtained with this approach are further refined by experimental shooting from guns submitted for examination, and in its absence the conclusion on the shot distance is formulated in a probabilistic form. Finally this approach is intended to help increase the efficiency of appointment and production of forensic gunshot residue examinations and expand scientific ideas of forensic ballistics.