ARSON DETECTION.  Arson = crime of intentionally starting a fire that damages property  Difficult to prove – - fire or firefighters destroy evidence.

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Presentation transcript:

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