Fires and Explosives

Identification and Difference

Evidence of Separate and Unconnected Fires

Look for multiple distinct fire areas that appear unrelated. This suggests that the fire was intentionally spread, possibly with an accelerant like gasoline and kerosene

Presence of Streamers

Streamers are trails of accelerant (petrol or paper) used to spread fire from one area to another. May be visible on the ground or around the structure

Containers Capable of holding an Accelerant

Containers like plastic bottles or cans that can hold and dispense flammable liquids. Often used to spread accelerants and initiate fires

Irregular burn pattern

Irregular burn patter may be left on floor due to presence of accelerant. This pattern is caused by pouring accelerants in specific areas and form a distinct shape unlike typical fire damage

Low Explosive

Undergo subsonic combustion (slower rate of reaction) Create a pressure wave without detonation, they burn.

Low Explosive Characteristics

• Needs to be confined to be effective

• Needs to produce heat, light and a subsonic pressure wave

• Used primarily as propellants (in ammunition)

Low Explosive Examples

• Black powder

• Smokeless powder

High Explosive

Denotate almost instantly at speeds ranging from 1,000 - 8,5000m per second creating a supersonic shock wave

High Explosive Characteristics

• More powerful and destructive, causing smashing and shattering effects

• Can detonate without confinement if triggered by shock, heat or friction

High Explosive Examples

• TNT

• PETN

• RDX

• Military and commercial applications