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Fire investigationMark Ross MSc. M.I.Fire.E. IAAI CFI
EFI Global, a Sedgwick company
What is fire?A rapid oxidation
reaction leading to the evolution of heat and light in varying
intensities
Pyrolosis
Fuel
Flame
PYROLOSIS ZONE
o2 o2
Combustion
Heat
Fuel Oxygen
Scientific method• Recognise the need• Define the problem• Collect the data• Analyse the data
• Develop a hypothesis• Test the hypothesis• Select the final hypothesis• (determine the cause)
What’s the difference?258 seconds 123 seconds
AccelerantA fuel or oxidizer, often an ignitable liquid. Used to initiate, increase the growth or spread of a fire
Case studyFatal fire resulting in the death of two children
Front door, open on the arrival of fire crews.
View of the hallway. The kitchen can be
seen at the end.
Fire damage in the bedroom.
Extensive fire damage in the
bedroom
Scene excavation photos
It is a capital mistake to theorise before one has data.
Insensibly one begins to twist the facts to suit theories, instead of theories to
suit facts.
- Sherlock Holmes
Thank youAny questions
Mark Ross MSc. M.I.Fire.E. IAAI CFISenior Forensic Investigator
EFI Global, a Sedgwick company
T +44 207 530 0605 M +44 7557 849937E [email protected]