[Impact of projectile incidence angle with obstacle during ricochet on the damage characteristics formed in smoothbore weapon shot].

The aim of this study was to establish the degree of projectile incidence angle with obstacle on forensic medical characteristic of gunshot injuries arising from smoothbore weapon fire and bullet ricochet. Based on the comprehensive forensic study results of experimental entry gunshot injuries, statistically significant differences in the following morphological signs were found for two ranges of incidence angle values (10-20° and 30-50°): «Number of MD», «Length 1 MD», «Length 2 MD», «Width 1 MD», «Orientation of AD to the conventional clock face relative to MD 1 or to the group of largest MD (max. value)».

[Morphological characteristics of gunshot injuries resulting from ricochet depending on type of experimental barrier].

The purpose of this study was to establish a set of distinctive features of the qualitative and quantitative parameters of gunshot injuries resulting from the ricochet of a bullet and buckshot when firing from a smooth-bore weapon, depending on the type of experimental barrier. As a result of the ballistic experiment, a list of statistically significant characteristics of input gunshot injuries of biological and non-biological targets formed when firing with a bullet and buckshot followed by a ricochet was revealed, which will enable to determine the sought type of barrier from the two suggested options: «Concrete 2» or «Brick», «Concrete 2» or «Metal», «Brick» or «Metal». Besides, a list of characteristics of input gunshot injuries has been established, the parameters of which are under statistically significant influence of the type of experimental barrier.

[Effect of the target type on the characteristics of gunshot injuries resulting from bullet and shrapnel ricochet].

The study objective is to establish the effect of the type of experimental target (biological, non-biological) on the forensic medical characteristics of gunshot injuries resulting from bullet and shrapnel ricochet when fired from a smooth-bore weapon. Differences in the skin and clothing or their imitators render different morphological patterns of the input gunshot injuries. Based on the results of the ballistic experiment, a list of statistically significant differences in the qualitative and quantitative characteristics of the input gunshot injuries to biological and non-biological targets as a result of a ricochet when a bullet is fired from a smooth-bore weapon was compiled.

[The phenomenon of the formation of a ricocheted buckshot of a negative angle of reflection].

The purpose of the study is to establish the possibility, determine the conditions and parameters for the formation of a negative angle of reflection of a firearm after a ricochet from the surface of an obstacle based on the results of our own experimental studies. Expert and law enforcement practice shows that after a shot, firearms, both before interaction with an obstacle and after a ricochet, move in space in the same plane with respect to the surface of the obstacle, forming a reflection angle with a positive or zero degree value. As a result of ballistic experiments, the possibility of forming a negative angle of reflection by ricocheted buckshot was established, the conditions and parameters for the occurrence of this pattern were determined.

[A human body simulator as an input parameter of ballistic experiment].

The purpose of the work is a comparative analysis of objects used in forensic ballistics as imitators of the human body for the formation of gunshot injuries, based on literature data and the results of our own experimental studies. A classification of objects of biological and non-biological origin, used to simulate the human body during the experimental simulation of a gunshot injury, is proposed. A set of advantages and disadvantages was studied, a critical assessment of the objects of each group was given, recommendations were made on their rational use in ballistic research.