The article introduces the possibility of proper evaluation of criminalistic traces in securing the crime scene and detecting the causes of fires. Investigating fires carries the risk of wrongly securing traces at the scene and, as a result, failing to investigate the crime. The authors deal with the general view of the criminological traces and also give concrete examples of criminological traces in case of fire investigations. The use of forensic traces is both in the area of object identification and in view of the creation of criminalistic versions. At the end, they cite as an example the typical traces that can be found in the places of fire.