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Fire investigators determine two things
•Origin – Where did the fire start?
•Cause – How did it start?
four signs of arson , what is suggest

FIre pattern clues


what do arsonist use cause fire
•Petrol
•Kerosene
•Alcohol
•These leave behind chemical residues.
Investigstors use what to find arson
Investigators use:
•Gas Chromatography
•Separate chemicals
•Identify flammable liquids
•Each accelerant has a unique chemical fingerprint.