1 carman & associates forensic science and fire investigation texas forensic science seminar...
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Carman & Associates
Forensic Science and Fire Investigation
Texas Forensic Science Seminar
Austin, Texas
October 8, 2010
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presented by
Steve CarmanIAAI-CFI, ATF CFI (Retired)
Carman & Associates Fire InvestigationDunsmuir, California
www.carmanfireinvestigations.com
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It is quite likely that no other profession has experienced a more
significant shift in the basic principles from which it operates in the last 30
years than fire investigation.
State of the Profession
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State of the Profession
In most areas of forensic science, practitioners are either educated scientists or
at least based their efforts on scientific principles.
In fire investigation, this has not always been the case.
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State of the Profession
For years, the vast majority of people involved in the investigation of fires came from the
ranks of the fire service or law enforcement.
Until the past few decades, fire investigation training was not generally
based upon strict scientific principles, but on anecdotal information.
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Art and ScienceFor many years, the fire investigation
profession was considered by those in its ranks as a mixture of ART and SCIENCE.
The ART related to how investigators processed scenes as well as interpreted the
evidence. In reality, it was another phrase for “Anecdotal”.
Science was considered but not emphasized.
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Em
phas
is
ScienceArt
Fire Investigation: Art vs. Science
1970’s 1980’s 1990’s 2000’s
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Apprenticeship
For much of the past fifty years, fire investigation training was generally
delivered via “on-the-job” training in a form akin to apprenticeship.
The more experienced would pass on their ideas and beliefs to the newer members of
their organizations.
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Training / Education
Most forensic science professionals working in areas such as DNA, serology, trace analysis
and similar specialties are college-trained scientists.
Historically, most fire investigators came from the ranks of fire fighters or law enforcement
officers. Most are not scientists.
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In a recent, non-published survey of 422 fire investigators by the National Center for
Forensic Sciences, the following statistics were gathered:
67 % had no college degree
10 % had a science related degree
23 % had a general degree
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The fire investigation field originally developed in order to meet one of two needs:
2) To learn what caused fires in order to try and prevent them in the future.
1) To bring arsonists to justice in case of criminal fires,
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What physical evidence did fire investigators often use to identify the cause of fires?
1) Physical artifacts found at fire scenes such as trace evidence, gasoline cans, trailers, incendiary devices, etc.
2) Burn patterns that investigators would interpret with regards to what caused them.
Forensic Evidence
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It is the burn patterns that have been the most common evidence used by investigators to enable them to find the area(s) of fire origin which could then enable them to try and identify the fire cause(s).
Forensic Evidence
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Interpretation of EvidenceUntil about 20 years ago, the identification and interpretation of burn patterns at fire
scenes was part of the ART of the profession.
Seldom was “provable science” used to establish how the patterns were created and
what they meant.
While some may have argued they were relying on science, what they were really relying on were non-scientific myths and legends.
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Interpretation of Evidence
While some may have argued they were relying on science, what they were really relying on were non-scientific myths and legends.
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Art vs. ScienceIn the mid-1980s, some of the earliest
coordinated efforts by the fire investigation community started to improve the reliability
of the profession.
Guidelines were published by the National Bureau of Standards to attempt to
standardize the practice.
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Art vs. Science
Unfortunately, the guidelines continued to include several non-scientific, anecdotal
myths and legends for use by investigators in evaluating fire scenes.
These were the same myths and legends that had for years, been handed down from one
fire investigator to the next.
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Art vs. ScienceFrom the 1970s onward, while field
investigators refined their art, more and more college-trained scientists began studying the
physics, chemistry, thermodynamics and fluid dynamics principles involved in fire behavior.
Unfortunately, these two groups had little interaction.
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Throughout the 1970s and 1980s, more investigation organizations arose. These
groups were often formed with the intent of offering improved training.
Participation was voluntary and sporadic.
Some fire departments and organizations participated eagerly, others much less so.
Early Standardization
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Early StandardizationVarious guidelines were proffered to improve
fire investigations.
They continued to be mostly anecdotal and not based on hard science.
These guidelines contained many of the modern day “Myths and Legends” of fire
investigations.
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Myths and LegendsSome of the myths and legends involved issues such as:
ALLIGATORING IN WOOD CHAR
SPALLING IN CONCRETE
CRAZED GLASS
ANNEALING OF SPRINGS
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Myths and Legends
FLAMMABLE LIQUID POUR PATTERNS
“HOT, FAST” FIRES
LOW-LEVEL BURNING
Almost none of these came about as the result of hard-scientific research. Even so, they
were (and in some cases still are) relied upon by fire investigators throughout the country.
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Myths and Legends
Despite not being scientifically valid, some of these “guidelines” were (and still may be) commonly relied upon by investigators in determining areas of fire origin and fire
cause.
Many investigators also used to (and sometimes still do) use them to defend their
conclusions in court.
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Fire in the Courts
Courts involved in both criminal and civil litigation have relied upon experts in fire
investigation who were trained in the lore of these “myths and legends”.
Allowance of these theories had for many years been based upon their level of “general
acceptance” amongst fire investigators.
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A Shift in FocusIn 1992, NFPA 921, Guide to Fire and
Explosion Investigation was first published by the National Fire Protection Association. Five
additional editions have followed.
The NFPA 921 committee consists of participants from various disciplines:
Scientists Public InvestigatorsEngineers Private Investigators
Insurance Representatives
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Training ChangesAlso in 1992, fire investigators from the Bureau of ATF began incorporating fire
science instruction from the University of Maryland’s Fire Protection Engineering staff
into their training program.
Around the same time, the use of actual fire testing in training programs nationwide
became a more common practice.
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Training ChangesTraining programs which for years had been
loosely based on an apprenticeship model began to shift towards scientific training.
Although fire scientists were familiar with the scientific principles of fire behavior for more than 30 years, the transfer of this information to the fire investigation community was just
starting.
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Training ChangesEmphasis amongst the fire investigation community began to shift away from the
“ART” of investigation and more towards the “SCIENCE”.
Nation-wide crazes about phenomena such as High Temperature Accelerant Fires and
Spontaneous Human Combustion began to be dispelled using solid scientific principles.
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Since the early 1980s, organizations like ATF working with the fire science community
have consistently emphasize the importance of hard science in fire investigation.
The average fire investigation training program has become more science oriented
than in years past.
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Advancements
Legal decisions such as Daubert, Benfiend and Kuhmo have significantly affected which
experts are now accepted by the courts and what evidence is allowed into fire-related
cases.
More and more fire engineers and scientists with graduate educations are getting involved
in the field of fire investigation.
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Advancements
ATF now has the world’s largest fire research laboratory and a full time staff of scientists and engineers dedicated to assisting ATF
Certified Fire Investigators and their state/local counterparts in testing hypotheses
of fire origin and cause.
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Advancements
Organizations such as the International Association of Arson Investigators and the National Association of Fire Investigators
offer certification programs for their members.
These programs promote standardization in training and achievement throughout the
profession. Some are nationally accredited.
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Though certification programs exist, managers in MOST fire departments, police departments and insurance companies and some attorneys still do not require their fire
investigation experts to be certified.
The unfortunate reality is that many managers do not recognize the large gaps between the “state of the art” and the skill levels of many of their own investigators.
Remaining Challenges
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In the past 20 years, great strides have been made by the fire investigation community to
change from within.
Acceptance of these principles and dedication to improve has largely remained voluntary
and a matter of self-motivation by the practitioners.
Remaining Challenges
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NFPA StandardsBy the early 1990s, NFPA was known for
many of its fire safety standards, often designed by committees of professionals
familiar with hard, scientific principles. These standards when adopted by local jurisdictions
, carry the force of law.
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NFPA StandardsNFPA 1033 – Standard for Professional
Qualifications for Fire Investigator
This standard, last updated in 2009, requires investigators to have and maintain an up-to-date basic knowledge at the post-secondary level in 13 specific, science-related topics or risk not qualifying as an expert in a court of
law.
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To this day, NFPA 921 has never been accepted as a “standard”. It remains a “guide”.
Even so, after years of refinement, it has become more common for courts nationwide
to consider it as the de facto “standard of care” in the field.
Standard of Care
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Despite great strides towards improvement in and reliability of fire investigations,
significant deficiencies still exist in the field.
Current State of the Profession
Many investigations are still based upon the myths of yesterday and not on science.
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Agencies and organizations employing fire investigators must demand a higher level of
expertise and certification.
In the absence of these internal controls, the courts will continue to be exposed to shoddy,
non-scientifically based expertise.
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While improvements have been consistently made in the profession overall in the past
twenty years, the question remains…
Is your particular expert using science or art in arriving at his/her conclusions?
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Final Thoughts
• It may often be beyond the abilities of any attorneys or judges to ascertain the accuracy of fire investigator claims without:
– 1) Extensive experience and/or training in the fire investigation arena, or
– 2) Assistance from qualified and peer-recommended experts in fire science that can be hired for technical / peer reviews.
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Steve Carman
916-215-4676 cell
www.carmanfireinvestigations.com
916-215-4676 cell
www.carmanfireinvestigations.com
Carman & Associates Fire InvestigationCarman & Associates Fire Investigation