Fire is a controlled phenomenon in which appearances oxidation of organic substances which generates heat and light. Fire is a key element in the evolution of modern man because it has enabled it to survive in different conditions. The definition of arson does not differ much from this definition of fire because it says fire is an uncontrolled phenomenon of oxidation of organic substances that also generate heat and light. Fire causes material damage and threatens human lives. Each fire and arson is a chemical processes that consists of three basic elements: fuel, oxygen and heat. Because of the nature of their occurrences, each fire and arson become subjects of interests in criminalities, forensics psychology and psychiatry. They are the subject of consideration of this paper.
Fire; Arson; Investigation; Criminal act