Features of detection, seizure and preliminary investigation of physical evidence at the scene of an arson

The article is devoted to the main problems that arise during the inspection of the arson scene, related to the detection, removal and preliminary investigation of traces and physical evidence. The authors give priority to identifying traces of accelerants, the most common of which are spilled oil products, which are related to flammable or combustible liquids. Identification of microquantities of these liquids at the fire scene after its extinguishing is a rather difficult task, requiring special knowledge of the signs of their combustion and the ability to detect them on different objects-carriers during the examining arson scene. The article suggests to use their ability to light up under the influence of ultraviolet radiation during the search for traces of oil products. Since many objects that carry liquid accelerants can also emit light, the authors recommend to collect oil slicks on nonluminescent material that would enhance the luminescence of liquid spot without distorting its character. Filter paper is offered as such material in terms of availability and capacity to enhance luminescence.The authors emphasize that only the correct removal and packaging of traces and physical evidence is a guarantee of a positive result of the examinations assigned for their research.