Использование мобильного источника криминалистического света «Микс-450» для обнаружения следов преступления

Abstract

One of the tasks of forensic science is to improve the tactics of conducting an inspection of the scene, which is largely associated with the use of modern technical and forensic tools used to detect, fix and seize traces and other material evidence in order to disclose and investigate a crime and establish the identity of the offender. However, as practice shows, the use of traditional technical means — portable sources of ultraviolet radiation to detect traces of biological origin (blood, semen, saliva and other human secretions) is not always effective. This is due to the fact that the intensity of the luminous flux of fluorescent lamps is quite low, which prevents the detection of traces during daylight hours. In addition, long-term illumination of the object, over 5 seconds, causes the destruction of the DNA in the blood and semen, which prevents the possibility of its further examination. At the same time, the arsenal of methods and technical means is constantly expanding. For example, a mobile forensic light source “MIKS-450” has now been developed. However, there is no information about the types of traces detected with its use. To fill this gap, the author of the article carried out a set of experiments, the results of which testify to the effectiveness of its use for detecting traces of human skin and preliminary examination of documents at the scene. The author also comes to the conclusion that the possibility of detecting traces of human skin depends on the physical properties of the trace substance (dirty or clean hands, dry or wet), the structure of the trace-sensing surface (smooth, rough), its color, as well as the time elapsed since the occurrence traces.