ARSON DETECTION
Arson = crime of intentionally starting a fire that damages property Difficult to prove – - fire or firefighters destroy evidence - combustible liquids (accelerants) evaporate quickly
Types of Fires CategoryDescription Natural Accidental Undetermined Deliberate
Types of Fires CategoryDescription NaturalCaused by acts of nature; ex. Lightening strike Accidental Undetermined Deliberate
Types of Fires CategoryDescription NaturalCaused by acts of nature; ex. Lightening strike AccidentalUnintentional & explainable; ex. Faulty wiring, carelessness Undetermined Deliberate
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
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
Burn Patterns PatternDescriptionIndication V-shape
Burn Patterns PatternDescriptionIndication V-shapeNarrow at bottom, spreads out as rises Normal pattern, no accelerant
Burn Patterns PatternDescriptionIndication V-shapeNarrow at bottom, spreads out as rises Normal pattern, no accelerant Inverted cone
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
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
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
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
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
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
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
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
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
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
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