Abstract: The subject of the research is the traces of crime left on the scene of the event as well as the condition of modern criminalistic technical means used by Internal Affairs Expert Subdivisions. In addition, the object of the research also involves processes of traces being created as well as particularities of their detection, fixation and extraction. The authors pay special attention to working with biological traces including blood found on the crime scene. The authors describe safety measures to be followed when detecting, extracting and packing weapon or ammunition. In the course of their research the authors have used a set of general and private research methods including standard logical method, systems analysis, synthesis, analysis, deduction, induction and other research methods. According to the authors, one of the most important today's goals of forensics should be improvement of examination tactics and criminalistic technical means that are already being used as well as testing and implementation of new findings in this sphere. Examination is not only the most famous and necessary investigator's action but also complex procedure.