1. ARSON DETECTION

2.  Arson = crime of intentionally starting a fire that damages property  Difficult to prove – - fire or firefighters destroy evidence - combustible liquids (accelerants) evaporate quickly

3. Types of Fires CategoryDescription Natural Accidental Undetermined Deliberate

4. Types of Fires CategoryDescription NaturalCaused by acts of nature; ex. Lightening strike Accidental Undetermined Deliberate

5. Types of Fires CategoryDescription NaturalCaused by acts of nature; ex. Lightening strike AccidentalUnintentional & explainable; ex. Faulty wiring, carelessness Undetermined Deliberate

6. Types of Fires CategoryDescription NaturalCaused by acts of nature; ex. Lightening strike AccidentalUnintentional & explainable; ex. Faulty wiring, carelessness UndeterminedCause unknown & can’t be identified Deliberate

7. Types of Fires CategoryDescription NaturalCaused by acts of nature; ex. Lightening strike AccidentalUnintentional & explainable; ex. Faulty wiring, carelessness UndeterminedCause unknown & can’t be identified Deliberate Intentionally set – may or may not be arson; ex. Campfire spreads out of control

8. Burn Patterns PatternDescriptionIndication V-shape

9. Burn Patterns PatternDescriptionIndication V-shapeNarrow at bottom, spreads out as rises Normal pattern, no accelerant

10. Burn Patterns PatternDescriptionIndication V-shapeNarrow at bottom, spreads out as rises Normal pattern, no accelerant Inverted cone

11. Burn Patterns PatternDescriptionIndication V-shapeNarrow at bottom, spreads out as rises Normal pattern, no accelerant Inverted coneWider at bottom, narrower upMay be accident or accelerant poured along floor

12. Burn Patterns PatternDescriptionIndication V-shapeNarrow at bottom, spreads out as rises Normal pattern, no accelerant Inverted coneWider at bottom, narrower upMay be accident or accelerant poured along floor Alligatoring

13. Burn Patterns PatternDescriptionIndication V-shapeNarrow at bottom, spreads out as rises Normal pattern, no accelerant Inverted coneWider at bottom, narrower upMay be accident or accelerant poured along floor AlligatoringLooks like scales of alligatorMay be from accelerant, maybe not

14. Burn Patterns PatternDescriptionIndication V-shapeNarrow at bottom, spreads out as rises Normal pattern, no accelerant Inverted coneWider at bottom, narrower upMay be accident or accelerant poured along floor AlligatoringLooks like scales of alligatorMay be from accelerant, maybe not Spalling

15. Burn Patterns PatternDescriptionIndication V-shapeNarrow at bottom, spreads out as rises Normal pattern, no accelerant Inverted coneWider at bottom, narrower upMay be accident or accelerant poured along floor AlligatoringLooks like scales of alligatorMay be from accelerant, maybe not SpallingLayers of concrete break away b/c of high temps May be from accelerant, maybe not

16. Burn Patterns PatternDescriptionIndication V-shapeNarrow at bottom, spreads out as rises Normal pattern, no accelerant Inverted coneWider at bottom, narrower upMay be accident or accelerant poured along floor AlligatoringLooks like scales of alligatorMay be from accelerant, maybe not SpallingLayers of concrete break away b/c of high temps May be from accelerant, maybe not Streamers

17. Burn Patterns PatternDescriptionIndication V-shapeNarrow at bottom, spreads out as rises Normal pattern, no accelerant Inverted coneWider at bottom, narrower upMay be accident or accelerant poured along floor AlligatoringLooks like scales of alligatorMay be from accelerant, maybe not SpallingLayers of concrete break away b/c of high temps May be from accelerant, maybe not StreamersShows a trail from one area to another Accelerant used to spread fire

18. Burn Patterns PatternDescriptionIndication V-shapeNarrow at bottom, spreads out as rises Normal pattern, no accelerant Inverted coneWider at bottom, narrower upMay be accident or accelerant poured along floor AlligatoringLooks like scales of alligatorMay be from accelerant, maybe not SpallingLayers of concrete break away b/c of high temps May be from accelerant, maybe not StreamersShows a trail from one area to another Accelerant used to spread fire Arc damage

19. Burn Patterns PatternDescriptionIndication V-shapeNarrow at bottom, spreads out as rises Normal pattern, no accelerant Inverted coneWider at bottom, narrower upMay be accident or accelerant poured along floor AlligatoringLooks like scales of alligatorMay be from accelerant, maybe not SpallingLayers of concrete break away b/c of high temps May be from accelerant, maybe not StreamersShows a trail from one area to another Accelerant used to spread fire Arc damageSpark caused by release of electricity Electrical wire; or from wire insulation

20. Burn Patterns PatternDescriptionIndication V-shapeNarrow at bottom, spreads out as rises Normal pattern, no accelerant Inverted coneWider at bottom, narrower upMay be accident or accelerant poured along floor AlligatoringLooks like scales of alligatorMay be from accelerant, maybe not SpallingLayers of concrete break away b/c of high temps May be from accelerant, maybe not StreamersShows a trail from one area to another Accelerant used to spread fire Arc damageSpark caused by release of electricity Electrical wire; or from wire insulation Pool or plant

21. Burn Patterns PatternDescriptionIndication V-shapeNarrow at bottom, spreads out as rises Normal pattern, no accelerant Inverted coneWider at bottom, narrower upMay be accident or accelerant poured along floor AlligatoringLooks like scales of alligatorMay be from accelerant, maybe not SpallingLayers of concrete break away b/c of high temps May be from accelerant, maybe not StreamersShows a trail from one area to another Accelerant used to spread fire Arc damageSpark caused by release of electricity Electrical wire; or from wire insulation Pool or plantLook like puddlesAccelerants collected in a pool at lowest point