Arson is defined as purposely setting fire to a house, building or other property. Arson is the second leading cause of death by fire in the U.S. An estimated 500 Americans died in arson-related fires. Arson caused more than $2 billion in property damage.
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Arson is defined as purposely setting fire to a house, building or other property.
Arson is the second leading cause of death by fire in the U.S. An estimated 500 Americans died in arson-related fires.
Arson caused more than $2 billion in property damage.
Only 19% of arson cases resulted in arrest, and only 2% were convicted.
50% of arsonists are under the age of 20 (40% are under 15 years old).
Ignition temperature and flash points are building or other property. NOT related!Arson Investigation
Flash point building or other property. - The temperature at which a particular flammable liquid
gives off vapors (vaporizes) and therefore can ignite.
The ignition temperature is the temperature required for a liquid to
continue to emit vapors that can sustain
A flammable liquid in its liquid state will not burn. It only will
ignite when it vaporizes into a gaseous state. All flammable liquids
give off vapors that can ignite and burn when an ignition source such as
a lighted cigarette or spark is present.
Point of Origin (POO).
Accelerants are any liquid, solid or gaseous material that will sustain or enhance flammability.
Liquid materials are commonly used because of ease of ignition and familiarity of use.
Accelerants are nearly exclusively derived from hydrocarbons.
Straight chain hydrocarbons are the backbone of the oil industry.
Hydrocarbons are molecules made up of the elements hydrogen and carbon.
Octane is a term familiar to all. It consists of a hydrocarbon having 8 carbons.
1. Light petroleum distillates (LPD)
3. Medium petroleum distillates (MPD)
5. Heavy petroleum distillates (HPD)
Dogs can detect 0.01 mL of 50% evaporated gasoline 100% of the time.
0.01 mL is about the size of a thousandth of a drop.
Evidence Containers will sustain or enhance flammability.Steps to Recover and Identify Accelerants
A gas chromatograph is coupled to a mass selective detector.
No Ignitable Liquids Were Detected will sustain or enhance flammability.An Ignitable Liquid Is Detected
We can look at this in four different ways...
No ignitable liquids were ever used
Ignitable liquids were used to start the fire, but have been totally consumed.
Ignitable liquids are still present; however, not in the collected sample.
Ignitable liquids are still present in the collected sample; however, they are too dilute to be detected.