Fire Patterns associated with Ignitable Liquid Accelerants

Slides:

Advertisements

Similar presentations

FORENSIC ASPECTS OF FIRE INVESTIGATION

Advertisements

Arson. The Common Accelerants  The most commonly used accelerants are petrol, kerosene, mineral turpentine and diesel.  These accelerants are generally.

Forensic Aspects of Fire Investigation

Chemistry of Fire.

Fire Basics Forensic Science

Forensic Aspects of Fire Investigation

Lecture Arson Analysis of Fire Debris Arson is defined as purposely setting fire to a house, building or other property.

FORENSIC ASPECTS OF FIRE INVESTIGATION

Name at least two possible sources of ignition:. Match Electrical Sparks Chemical.

13-1 ©2011, 2008 Pearson Education, Inc. Upper Saddle River, NJ FORENSIC SCIENCE: An Introduction, 2 nd ed. By Richard Saferstein FORENSIC ASPECTS.

Fire Investigations The purpose of a fire investigation is to determine: What was the origin of the fire? What was the cause of the fire? Was it accidental.

Arson and Fire Investigation

Fire Scene Preservation

Forensic Science.  Read about the fire at the Happy Land Social Club  What were the materials that created the fire?  Why was this fire so deadly?

Flash point - The temperature at which a particular flammable liquid gives off vapors (vaporizes) and therefore can ignite. The ignition temperature is.

1 Book Cover Here Chapter 21 ARSON AND EXPLOSIVES Criminal Investigation: A Method for Reconstructing the Past, 7 th Edition Copyright © 2014, Elsevier.

ARSON. Do Now: What is arson? Fill out the video questions. We will finish tomorrow. Closure: What causes a back draft? Objectives: discover what arson.

FIRE BEHAVIOR State of Georgia BASIC FIRE FIGHTER TRAINING COURSE Module 1.

12-1 PRENTICE HALL ©2008 Pearson Education, Inc. Upper Saddle River, NJ FORENSIC SCIENCE An Introduction By Richard Saferstein FORENSIC ASPECTS OF.

Criminalistics, 10e Richard Saferstein © 2011, 2007, 2004, 2001, 1998, 1995 Pearson Higher Education, Upper Saddle River, NJ All Rights.

11.1 N OTES Arson & Explosion. C RIMINALISTS ’ ROLE IS TO A. Establish the motive B. Establish the modus operandi C. Establish the suspect D. Detect and.

Vocabulary PowerPoint

Fire Debris Analysis Forensic Crime Science Eisenhower High School.

Searching the Fire Scene

Catching Killers FIRE INVESTIGATION. Used to be the ideal way for a criminal to make evidence go up in smoke Arson Investigation Unit New techniques &

Name at least two possible sources of ignition:. Match Electrical Sparks Chemical.

Jim Page, 2007 Chapter 11: Fire & Explosion Investigation MINA Handbook.

13-1 ©2011, 2008 Pearson Education, Inc. Upper Saddle River, NJ FORENSIC SCIENCE: An Introduction, 2 nd ed. By Richard Saferstein FORENSIC ASPECTS.

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

Low Burning and Holes In The Floor. What is the Myth?  Burn marks on a floor indicate that a fire was set on purpose because…  heat rises  fires only.

Forensic Crime Science Eisenhower High School

Forensic Science T. Trimpe/B.Brooks 2006

Fire Terms. AFFF Foam A fire fighting foam known as aqueous film forming foam Forms a layer of film between the fuel and the oxygen causing the fire.

Forensic Science II Forensic Fire Analysis. Fire Investigation Terms Fire - Produced when a substance undergoes rapid oxidation involving heat and light.

Forensic Fire investigation. Arson? When investigating a fire one of the questions asked is, “Was this arson?” This question is difficult to answer based.

Unit 4 – Sources of Ignition and Fire Patterns. Unit 4 Seminar Topics  Common sources of ignition Burn and smoke patterns Tips for the Investigator FS.

UNIT 2: FIRE SCENE EXAMINATION Slide 2-1. ENABLING OBJECTIVES Examine a structure from the exterior to interior in a systematic manner to identify indicators.

ArsonAnalysis of Fire Arson is defined as purposely setting fire to a house, building or other property. Arson is the second leading cause of death by.

Fire Debris Fire debris is submitted to laboratories for analysis by the fire marshal, crime scene investigators, forensic scientists, and insurance investigators.

FORENSIC ASPECTS OF FIRE INVESTIGATION

Fire Debris Fire debris is submitted to laboratories for analysis by the fire marshal, crime scene investigators, forensic scientists, and insurance investigators.

Arson Detection.

FORENSIC ASPECTS OF FIRE INVESTIGATION

Searching, Preserving and Collecting Evidence from an Arson Scene

Fire as Evidence.

Arson and Fire Investigation

Fire Patterns associated with Ignitable Liquid Accelerants

Fire Debris Fire debris is submitted to laboratories for analysis by the fire marshal, crime scene investigators, forensic scientists, and insurance investigators.

Arson Arson is the crime of maliciously, voluntarily, and willfully setting fire to the building, buildings, or other property of another or of burning.

Fire Basics Forensic Science.

Essentials of Fire Fighting

Arson 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.

FORENSIC ASPECTS OF ARSON AND EXPLOSION INVESTIGATIONS

8th Grade Forensic Science

Fire Basics Image:

Fire and Explosions.

FORENSIC ASPECTS OF FIRE INVESTIGATION

Forensic Fire investigation

Fire Scene Preservation

Forensic Crime Science

Thursday February 8, 2018 (Discussion – Fire Basics; Textbook Assignment – Collection and Preservation of Arson Evidence)

Fire Basics Image: T. Trimpe/B.Brooks

Chapter 14 FORENSIC ASPECTS OF FIRE INVESTIGATION

Forensic Fire investigation

(Discussion and Textbook Assignment - Searching the Fire Scene)

Warm Up Objective: Scientists will describe forensic explosives and arson by taking notes and analyzing the activity. What is the topic? What will you.

Presentation transcript:

Fire Patterns associated with Ignitable Liquid Accelerants Fire and Arson Investigation Fire Patterns associated with Ignitable Liquid Accelerants By Bob Corry www.sceneinvestigator.com

of a fire scene examination is the recognition, identification “One of the major objectives of a fire scene examination is the recognition, identification and analysis of fire patterns.” NFPA 921 (2004) 4.1

Success in Recognizing Arson begins with recognizing possible Arson Fire Patterns

NFPA 921 on Fire Patterns Holes in the floor may be caused by glowing combustion, radiation or an ignitable liquid. 6.2.3.1 There is no justification that the appearance of large, curved blisters is an exclusive indicator of an accelerated fire. 6.5.5 The presence or absence of spalling should not, in and of itself, be construed as an indicator of the presence or absence of a liquid fuel accelerant. 6.6.2.3 The collapse of springs cannot be used to indicate exposure to a specific type of heat source or ignition such as smoldering ignition or the presence of an ignitable liquid. 6.14 Inverted cone patterns have been interpreted as proof of flammable liquid fires, but any fuel source that produced flame zones that do not become vertically restricted can produce inverted cone patterns. 6.17.3.1.2

First! Search for Odd Variations in Fire Patterns Unusual “localized” wall pattern Unusual, localized damage to the bed Unusual floor burn pattern

Furniture moved before fire! Witnesses Reported: Odor of Gasoline! A low pressure wave! Furniture moved before fire!

or hair of a suspect/witness. Symptoms of Ignitable Liquid Use (Possible indicators of an accelerated fire) Burn injuries to the hands, face, legs or hair of a suspect/witness.

(downward, unusually fast, etc.) Unnatural Fire Spread (downward, unusually fast, etc.) Afternoon Program

“Unnatural” Fire Damage One gallon of gasoline was poured here!

Bright yellow/orange flames accompanied by black smoke.

Intense localized rusting/warping, especially to the undersides of metal objects within the pattern

especially to the undersides of Intense localized rusting/warping, especially to the undersides of metal objects within the pattern

Structural damage inconsistent with fire loading

Intermixed light, medium & heavy burn patterns within the overall pattern

sheen on the surface of suppression water over the pour area. “Rainbow-colored” sheen on the surface of suppression water over the pour area.

Accelerant containers in or near the scene.

bottom of boxes, furniture legs, etc. Increased burn damage pattern at the bottom of boxes, furniture legs, etc.

Pool shaped, intermixed, mottled black and brown staining on concrete together with a tendency to repel water.

“Ghost marks” between seams of floor tiles within the pour area.

Localized “clean burn”area on a wall or appliance above a pattern where intense heat burned away soot deposits.

“Inverted Cone” fire pattern

Search for the soot plume!

Key Properties of Common Ignitable Liquids Behave like any liquid before ignition. Most float on water, are immiscible, rainbow Form explosive vapors at room temperatures Vapors are heavier than air Readily absorbed Powerful solvents Don’t spontaneously ignite Explosive Limits/Ignition Temperature Sampling the accelerant fire pattern

Related Physical Evidence The Accelerant Container Other instrumentalities (i.e. ignition device) Changing the arrangement of combustibles to increase fire loading Propping open doors & windows The ignition device Explosion/Deflagration? Burn patterns and the burned “perp”

For Specialized Training: www.interfire.org

Accelerant Detection K-9 Teams are very important especially in large loss fires.

A Pocket Guide to Accelerant Evidence Collection, 2nd Edition Cited as a reference in all editions of NFPA 921, Kirk’s Fire Investigation 5th Edition, interFIRE VR Go to www.maiaai.org for more information