A basic study of the properties of accelerants in fire residues for better sampling in arson analysis

Some basic physical aspects of the accelerants in fire residues and their effects on the detectability of the added accelerants were investigated based on a few simple experiments conducted on various accelerants and matrices. In order to more precisely locate the points where the accelerants have been added by the arsonist and to decide what kind of sample container can best fit the established arson analysis procedure, a series of experiments were also performed including those assisted by a dog. It is concluded that the understanding of such basic properties as the volatility, osmosis, and adsorption of accelerants in various matrices can be very helpful for arson investigators. Canine detection shows much promise in helping fire investigators more precisely locate the exact spot where the accelerants have been added by the arsonist