According to McGraw Hill, “One practical way to investigate the cause of the fire is to find the point of creation. After the area of origin has been established, the investigator should check for the level of origin by examining the bottoms of shelves, ledges, moldings, and furniture and all sides of the legs, arms, and framework of reconstructed furniture. The floor and lower areas of the room produce the most clues to the cause for the fire, because they are living areas” (McGraw Hill, 2002).
Where and how did the fire start? There are two components that cause a fire, a heat source, and the material ignited. According to Hess, Orthman, “The point of origin is established in finding the area with the deepest char, alligatoring and usually the greatest destr...
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...nd remarks or unusual changes. Also look for evidence of disabled or turned-off alarms or sprinkler systems and doors left open. Finally, look for evidence of motive. Hard evidence in arson would be computer data, even if the computer has been burned; the hard drive may be intact. Also identifying accelerants at a scene is good evidence, using a gas chromatography with a flame ionization detector can identify 95 percent of the cases. Sifting of ashes, use hypodermic or cooking syringes to collect accelerants in cracks or floor boards” (Hess, Orthman, 2013).
Hess/Orthmann, C., & Matison/Hess, K. (2013). Criminal investigation. (Tenth ed., p.g 485-
500). New York: Delmar Cengage Learning
McGraww Hill (2002) McGraw-Hill Higher Education. Retrieved from http://highered.mcgraw-
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