Title: Chp. 1 Introduction to Forensic Science
1Chp. 1Introduction to Forensic Science
- In school, every period ends with a bell. Every
sentence ends with a period. Every crime ends
with a sentence. - Stephen Wright, comedian
2Answer on notebook paper
- 5 things you know about forensics
- 4 things youve heard about forensics
- 3 things youve NEVER heard of (look through
book) - 2 Questions about forensics
- 1 thing you MUST know about forensics
3Please Do Now
What does forensic science mean to you? What
would you like to learn about in forensic
science? (you can look at your book for this
question only) Please write at least 5 lines in
your composition book.
4Count the Fs
- Finished files are the result of years of
scientific study combined with the experience of
many years.
5There are 6!
-
- Finished files are the result of years of
scientific study combined with the experience of
many years.
6Forensics
- Forensic science has come to mean the application
of the natural and physical sciences to the
resolution of conflicts within a legal setting. - The study and application of science to matters
of law - Includes the business of providing timely,
accurate, and thorough information to all levels
of decision makers in our criminal justice
system. - Comes from the Latin forensus, meaning of the
forum - In Ancient Rome, the forum was where governmental
debates were held, but it was also where trials
were held (it was the courthouse)
7I. Definition of Forensic Science
The application of science to the criminal and
civil laws that are enforced by police agencies
in a criminal justice system.
8Scope of Forensic Science
The 10 sections of The American Academy of
Forensic Science (the largest forensic science
organization in the world) are
- 7. Physical Anthropology
- 8. Psychiatry and Behavioral Science
- 9. Questioned Documents
- 10. Toxiology
- Criminalistics
- Engineering science
- General
- Jurisprudence
- Odontology
- Pathology/ Biology
9Scope of Forensic Science
The list of professions of The American Academy
of Forensic Science is not exclusive. It does
not encompass skills such as
- Fingerprint examination
- Firearm and tool mark examination
- Computer and digital analysis
- Photography
10II. History and Development of Forensic Science
- Mathieu Orfila
- father of forensic toxicology (the study of
the adverse effects of chemicals or physical
agents on living organisms) - (1814)
11Please Do Now
Read the article Toxicology on Trial and answer
the following in your composition book Was
Marie Lafarge found innocent or guilty? Why?
12II. History and Development of Forensic Science
Alphonse Bertillon (Father of Criminal
Investigation) Devised the first scientific
system of personal identification through
anthropometry in 1879
Photo showing the measurement of the cubit (from
the tip of the middle finger to the elbow) from
the 1893 Worlds Columbian Exposition in Chicago.
13Figure 13 Bertillons system of bodily
measurements (anthropometry) as used for the
identification of an individual. Courtesy Sirchie
Finger Print Laboratories, Inc., Youngsville,
N.C., www.sirchie.com
14Bertillon Activity
- Use measuring tapes to measure
- The length of torso from the top of your head to
the bottom of your seat in a chair - The length of your arm from elbow to tip of
middle finger - The hand from wrist to tip of middle finger
- Record the data on a piece of notebook paper in a
data table and find averages for males and
females in the class
15Bertillon Activity cont.
- Was there a difference between the male and
female average measurements? Why or why not? - Do any two people in the class have exactly the
same three measurements? If yes - who. Explain
why or why not? - Would you want to have to take 9 different
measurements for 10 000 people? Why or why not.
16II. History and Development of Forensic Science
Sir Arthur Conan Doyle wrote Sherlock
Holmes uncanny ability to describe scientific
methods of detection years before they were
actually discovered and implemented 1887 - A
Study in Scarlet
17II. History and Development of Forensic Science
Francis Galton Conducted the first definitive
study of fingerprints and their
classification (1892)
Galton displayed his own fingerprints as part of
his title page
18II. History and Development of Forensic Science
Hans Gross Credited with coining the term
criminalistics Wrote first treatise describing
the application of scientific principles to the
field of criminal investigation (1893)
19II. History and Development of Forensic Science
Dr. Karl Landsteiner Identifies human blood
groups- A, B, AB and O (1901)
20II. History and Development of Forensic Science
Albert S. Osborn Developed the fundamental
principles of document examination (1910)
Author of Questioned Documents
21II. History and Development of Forensic Science
Edmond Locard Father of criminalistics Built the
worlds first forensic lab in France (1910)
22Locards Exchange Principle
When two objects come into contact with each
other, a cross-transfer of materials occurs.
Every Contact Leaves a Trace
23II. History and Development of Forensic Science
Leone Lattes Developed a procedure to determine
blood type from dried bloodstains (1915)
24II. History and Development of Forensic Science
Calvin Goddard Used a comparison microscope to
determine if a particular gun fired a
bullet (1929)
Goddard with comparison microscope
Worked on the St. Valentines Day massacre
25II. History and Development of Forensic Science
Walter McCrone Used microscopy and other
analytical methodologies to examine
evidence (1916-2002)
Worked on Shroud of Turin (controversy with
results)
26II. History and Development of Forensic Science
Sir Alec Jeffreys Developed the first DNA
profiling test in 1984
27HOMEWORK
Read CRIME LABORATORIES pages 14 to
23 Answer Review Questions 11 to 22
28III. The Crime Lab
Katie Woodward, a forensic scientist at the
Washington State Patrol Crime Lab, examines a
coat for blood spatter. When found, she removes
it for DNA analysis. (March 22, 2003)
29Crime Lab History
- First police crime lab in the world was
established in _______ in 1910 by
__________________ - First police crime lab in the U.S. opened in 1923
by _____________________________ - The first FBI crime lab opened in _________
- (now the worlds largest forensic lab -
performing more than ___________ examinations per
year
France
Edmond Locard
Los Angeles Police Department
1932
one million
30Please Do Now
"Only two things are infinite, the universe and
human stupidity, and I'm not sure about the
former" -- Albert Einstein
31Development of Crime Labs
- Characterized by a rapid growth accompanied by a
lack of national and regional planning and
coordination. - Current system of crime labs in U.S. is best
described as decentralized - Approximately 350 public crime laboratories
operate at various levels of governmentfederal,
state, county, and municipal.
32Growth of Crime Labs since 1960
- Supreme Court decisions in the 1960s responsible
for police placing greater emphasis on
scientifically evaluated evidence. (suspect must
be advised on their rights - less confessions as
a result) - Staggering increase in crime rates.
- All illicit-drug seizures must be sent to a
forensic lab for confirmatory chemical analysis
before going to court. - The advent of DNA profiling. (expected to add
10,000 forensic scientists in coming years due
to DNA profiles)
33Major Crime Labs in the U.S.
- FBI (Federal Bureau of Investigation)
- DEA (Drug Enforcement Administration)
- ATF (Alcohol, Tobacco, Firearms and Explosives)
- U.S. Postal Service
- U.S. Fish and Wildlife Service
34International Crime Labs (more than 100
countries have at least 1 forensic science lab)
- Great Britain has a national system (in contrast
to U.S. independent local labs) of regional labs
under direction of the governments Home Office. - Canada has 3 government-funded institutes
- 6 Royal Canadian Mounted Police regional labs
- The Centre of Forensic Sciences in Toronto
- The Institute of Legal Medicine and Police
Science in Montreal
35Crime LabBasic Services
- Physical Science Unit
- Chemistry
- Physics
- Geology
- Biology Unit
- Firearms Unit
- Document Examination Unit
- Photography Unit
36Crime LabBasic Services(Physical Science Unit)
- Applies principles of chemistry, physics and
geology to identify and compare physical evidence
such as - Drugs
- Glass
- Paint
- Explosives
- Soil
37Crime LabBasic Services(Biology Unit)
- Applies knowledge of biological sciences to
investigate samples such as - Blood
- Body fluids
- Hair
- Fibers
- Botanical samples
- (ex. wood, plants)
38Crime LabBasic Services(Firearms Unit)
- Examines
- Firearms
- Discharged bullets
- Cartridge cases
- Shotgun shells
- Ammunition of all types
- Garments and other objects for
- firearms discharge residues
- Approximate distance from target
- to weapon
39Crime LabBasic Services(Document Examination
Unit)
- Studies handwriting and typewriting on questioned
documents to determine authenticity and/or source - Analyze paper and ink
- Examine indented writings,obliterations, erasures
and burned or charred documents
40Crime LabBasic Services(Photography Unit)
- Use of highly specialized photographic techniques
to make invisible information visible to the
naked eye, such as - Infrared
- Ultraviolet
- X-ray photography
- Photographs crime scenes and physical evidence
- Prepares photographic exhibits for court
41Crime LabBasic Services(Photography Unit)
42Optional Services Provided by Full-Service Crime
Lab
- Toxicology Unit examines body fluids and organs
for - the presence of drugs and poisons.
- Latent Fingerprint Unit processes and examines
- evidence for latent fingerprints.
- Polygraph Unit conducts polygraph or lie detector
- tests.
- Voiceprint Analysis Unit attempts to tie a
recorded - voice to a particular suspect.
- Evidence-Collection Unit dispatches specially
trained - personnel to the crime scene to collect
- and preserve physical evidence.
43Figure 110 An envelope containing anthrax
spores along with an anonymous letter was sent to
the office of Senator Tom Daschle shortly after
the terrorist attacks of September 11, 2001. A
variety of forensic skills were used to examine
the envelope and letter. Also, bar codes placed
on the front and back of the envelope by
mail-sorting machines contain address information
and information about where the envelope was
first processed. Courtesy Getty Images,
Inc.Liaison
44Special Forensic Science Services
- Forensic Pathology
- Forensic Anthropology
- Forensic Entomology
- Forensic Psychiatry
- Forensic Odontology
- Forensic Engineering
- Forensic Computer and Digital Analysis
45Special Forensic Science Services(Forensic
Pathology)
- Concerned with determining the cause of death
-
- Examines wounds and injuries
A forensic pathologist examines a kidney during
an autopsy.
Click for autopsy video
This is the place where the dead shall teach the
living.
46Please Do Now
- Explain the statement This is the place where
the dead shall teach the living. in reference to
forensic pathology. - Please write at least 5 lines in your
composition book.
47Special Forensic Science Services(Forensic
Anthropology)
- Assist in identification of deceased individuals
whose remains are decomposed, burned, mutilated
or otherwise unrecognizable
48Special Forensic Science Services(Forensic
Anthropology)
An anthropologist exhumes an unidentified set of
remains from a Sarajevo cemetery. Forensic
anthropology teams match these and thousands of
other remains from conflicts around the world
with DNA samples from family members of missing
relatives. Photo by T.J. Grubisha 2002, U.S.
State Department.
49Special Forensic Science Services(Forensic
Entomology)
- Uses insects to help law enforcement determine
the cause, location and time of death (TOD) of a
human being - Insect life cycles act as precise clocks which
begin within minutes of death - Used to determine the TOD when other methods are
useless - Insects can also show if a body has been moved
after death
50Special Forensic Science Services(Forensic
Psychiatry)
- Examines relationship between human behavior and
legal proceedings is examined - Determine if person is competent to stand trial
- Examines behavior patterns of criminals as an aid
to developing a suspects behavioral profile
51Special Forensic Science Services(Forensic
Odontology)
- Helps identifies victims based on dental evidence
- Bite mark analysis - compare marks left of a
victim and the tooth structure of a suspect
52Bite Marks
Pattern injury displaying ovoid pattern and
central bruising
Pattern injury displaying linear interrupted
abrasions
53Special Forensic Science Services(Forensic
Engineering)
- Concerned with
-
- failure analysis
- accident reconstruction
- causes and origins of fires or explosion
54Corrosion Engineering Failure Analysis
55Special Forensic Science Services(Forensic
Computer Science Digital Analysis)
- Identifying, collecting, preserving, and
examining information derived from computers and
other digital devices, such as cell phones - Recovering deleted or overwritten data from a
computers hard drive - Tracking hacking activities within a compromised
system
56CLASSWORK / HOMEWORK
Read the article Making an Impression, Bite-mark
study could bolster use as evidence and answer
the questions on a separate piece of paper.
57What are the 3 major avenues available to police
investigators in solving a crime?
- Confessions
- Eyewitness accounts by victims and/or witnesses
- Evaluation of physical evidence recovered from
the crime scene
Which of the above is free of inherent error or
bias?
Only PHYSICAL EVIDENCE WHY?
58Only PHYSICAL EVIDENCE is free of inherent error
or bias WHY?
Because physical evidence MUST undergo scientific
inquiry Scientific integrity is due to strict
guidelines that ensure careful and systematic
collection, organization, and analysis of
information (this is known as ____________________
__)
The Scientific Method
59The Scientific Method
- Formulate a question worthy of investigation.
- Formulate a reasonable hypothesis to answer the
question. - Test the hypothesis through experimentation.
- Testing process must be thorough and recognized
by other scientists as valid. - When the hypothesis is validated by
experimentation, it become suitable as scientific
evidence, appropriate for criminal investigation
and for admission in court.
60Skills of a Forensic Scientist
- Applying the principles and techniques of the
physical and natural sciences to the analysis of
the many types of evidence that may be recovered
during a criminal investigation - Participate in training law enforcement personnel
in the proper recognition, collection, and
preservation of physical evidence - May provide expert court testimony
61Expert Witness
- Must establish his or her credibility through
credentials, background and experience - One whom the court determines possesses knowledge
relevant to the trial that is not expected of the
average person
Watch a Forensic Expert Witness (1)Testify
62Expert Witness
- Evaluates evidence based on specialized training
and experience that the court lacks the expertise
to do - Then expresses an opinion as to the significance
of the findings
Watch a Forensic Expert Witness Testify (2)
63Facets of Guilt
- Try to prove
- Meansperson had the ability to do the crime
- Motiveperson had a reason to do the crime
- (not necessary to prove in a court of
law) - Opportunityperson can be placed at the
- crime
64Federal Rules of Evidence
- In order for evidence to be admissible, it must
be - Probativeactually prove something
- Materialaddress an issue that is relevant to the
particular crime
65Admissibility of Evidence
- 1923 Frye v. United States
- Scientific evidence is allowed into the courtroom
if it is generally accepted by the relevant
scientific community. The Frye standard does not
offer any guidance on reliability. The evidence
is presented in the trial and the jury decides if
it can be used. - NOTE Frye standard used in Pennsylvania
(6/11/04)
- 1993 Daubert v. Dow
- Admissibility is determined by
- Whether the theory or technique can be tested
- Whether the science has been offered for peer
review - Whether the rate of error is acceptable
- Whether the method at issue enjoys widespread
acceptance. - Whether the opinion is relevant to the issue
- The judge decides if the evidence can be entered
into the trial.
66Frye v. United States, 1923
- James Frye convicted of second degree murder
- On appeal, defense counsel said that the court
erred when it refused the introduction of a
systolic blood pressure deception test and expert
testimony on the test as evidence - The court stated that, to be accepted in a court
of law, the scientific evidence must be generally
accepted in the scientific community - Systolic pressure deception test was NOT
generally accepted by scientific community so not
admissible
67Rule 702 of Federal Rules of Evidence
- Sets a different standard (from the Frye
standard) for admissibility of expert testimony
68Rule 702 of Federal Rules of Evidence
- A witness is qualified as an expert by
knowledge, skill, experience, training or
education and may offer expert testimony on a
scientific or technical matter if - The testimony is based upon sufficient facts or
data - The testimony is the product of reliable
principles and methods - The witness has applied the principles and
methods reliably to the facts of the case
69Daubert v. Merrell Dow Pharmaceuticals, Inc., 1993
- Two minor children their parents sued Dow,
claiming the childrens serious birth defects
were due to a prescription drug marketed by Dow - Court ruled evidence didnt meet the standard of
general acceptance for admission of expert
testimony
70Daubert v. Merrell Dow Pharmaceuticals, Inc., 1993
- On appeal, U.S. Supreme Court ruled that the Frye
standard is not the only rule for admissibility
of scientific evidence. - Admissibility of expert testimony should be
controlled by Rule 702 of the Federal Rules of
Evidence - It need not be generally accepted in the the
scientific community, rather it should be
admitted if it rests on a reliable scientific
foundation and is relevant to the issue at hand - Daubert rule only applies to federal courts, but
states are expected to use the decision as a
guideline in setting standards
71Admissibility of Evidence
- 1923 Frye v. United States
- Scientific evidence is allowed into the courtroom
if it is generally accepted by the relevant
scientific community. The Frye standard does not
offer any guidance on reliability. The evidence
is presented in the trial and the jury decides if
it can be used.
- 1993 Daubert v. Dow
- Admissibility is determined by
- Whether the theory or technique can be tested
- Whether the science has been offered for peer
review - Whether the rate of error is acceptable
- Whether the method at issue enjoys widespread
acceptance. - Whether the opinion is relevant to the issue
- The judge decides if the evidence can be entered
into the trial.
72Kumho Tire Co., Ltd. v. Carmichael, 1999
- Court unanimously ruled that the gatekeeping
role of the trial judge applied not only to
scientific testimony, but to ALL EXPERT TESTIMONY
73Coppolino Case Study(whiteboard the following)
- What was Coppolino charged with?
- What was the result of the trials?
- If you were the forensic expert on this case
would you have done anything differently?
Explain. - What was special about this case?
74Coppolino v. State, 1968
- Coppolino standard
- the court allows a novel test or piece of new,
sometimes controversial, science on a particular
problem at hand if an adequate foundation can be
laid even if the profession as a whole isn't
familiar with it.
75Detection of Curare in the Jascalevich Murder
Trial
- What was the reason this case was given at this
point in the text? - What was Jascalevich charged with?
- What was the result of the trial?
- If you were the forensic expert on this case how
would you have handled the investigation
differently?
76(No Transcript)