[The distinc features of a blood drip stain on a surface covered with house dust]. / Osobennosti sleda kapli krovi na poverkhnosti, pokrytoi bytovoi pyl'yu.

The purpose of the investigation is to establish the characteristics of a blood drip stains on a surface covered with house dust. In most cases, objects at the crime scene are covered in some degree of dust deposits. Accordingly, in external bleeding wounds, blood drops on dusty surfaces. The experiment established the peculiarities of drip stains on glass covered with dust. Compared with a clean surface, there was a greater number of spines at the edge of the drip stain. There was pronounced widespread and sectoral splashing. This can be explained by the fact that the dust particles are obstacles which, when the droplet spreads across the surface, form an irregular edge and cause splashing.

[Fatal injury to the neck while working with an angle grinder]. / Smertel'noe ranenie shei pri vypolnenii montazhnykh rabot s ispol'zovaniem uglovoi shlifoval'noi mashiny.

A fatal accident using an angle grinder is presented. During the forensic medical examination of the corpse, a soft tissue wound of the neck was found, localized in the region of its anterior and right lateral surfaces, with damage to the common carotid artery, internal jugular vein, sternocleidomastoid and sternothyroid muscles, thyroid lobe, incomplete transection of the trachea and esophagus caused by the rotating disc of an angle grinder. This observation supplements the existing ideas about injuries caused by power tools, as well as the possibility of reconstructing an event based on a comprehensive assessment of data from the scene.

[Morphology of traces of large blood drops on a snow-covered surface with different bleeding source height]. / Morfologiya sledov krupnykh kapel' krovi na snezhnom pokrove pri razlichnoi vysote raspolozheniya istochnika krovotecheniya.

Aim is to study morphology of the traces of a large drop of blood formed on snow-covered surface when it falls from different heights. In the experiment, we studied the morphology of blood drop traces fallen from 20, 50 and 100 cm on a just settled dry snow cover in a moderately frosty environment (-8 °C) Dropping from a height of up to 20 cm, a blood drop formed a cylindrical channel in the snow cover and spread out to form a disc-shaped element. However if the bleeding source was located at a 50 and 100 cm distance, an element close to a ball, consisting of blood crystals and ice was formed in the final section of the cylindrical channel. Morphology of the trace in freshly settled dry snow is due to the realization of the kinetic energy of a falling drop on the one hand, and the cooling of blood and crystallization on the other. Data obtained may be used to identify and describe traces of blood found on the scene in the street in the winter.

[Analysis of blood morphology in the case of arterial damage]. / Analiz morfologii sledov krovi, obrazovavshikhsia pri povrezhdenii arterii.

The aim of this study was the morphological analysis of traces of arterial bleeding, depending on the size of the blood vessel damage. A total of 21 archived medical-criminalistic expert reports related to the establishment of the types and mechanisms of blood trace formations were analysed. In all cases, there was damage to the arteries with external bleeding. The relationship between the size of arterial damage and the morphological characteristics of blood traces was established.

[Influence of negative ambient temperature on the morphology of blood droplet traces]. / Vliianie otritsatel'noi temperatury okruzhaiushchei sredy na morfologiiu sledov kapel' krovi.

The aim of this study was to identify the peculiarities of blood droplets on the street in frosty weather on the surfaces of objects with a negative temperature. The effect of negative ambient temperature (-19 °C) on the morphology of blood droplet traces was experimentally established. On cold trace surfaces, the droplet footprint was smaller, relatively flat and with wave-shaped edges; there was no splashing. Such a morphological presentation in frosty weather arises from the rapid cooling of the falling drop of blood which crystallizes in contact with the cold surface. There was no complete spreading of liquid droplets. The data obtained should be taken into account when assessing the traces of blood droplets detected at the scene of the incident on the street in winter, in order to avoid expert errors in determining their mechanism and the height of the blood source.