Transcript Do Not - Squarespace

CSI:Helen
a High
Crime Scene Investigation
http://www.youtube.com/watch?v=TSe_IkOd4J0
Ted BundySerial Killer
Ted Bundy:
Handsome, gregarious
Former law student
40+ murders between
1964-1978
Pacific Northwest
California, Idaho, Utah,
Colorado, Florida
Victims: young women
Murdered by: blunt
instrument and
strangulation
Tallahassee, FL-3 week murder
spree killing 2 women at sorority
house and a 12 year old girl.
Sorority victim beaten over head
with log, raped and strangled.
Bite marks on left buttock and
breast.
Supremely confident: Bundy
represented himself in court as
his own lawyer.
Forensic odontologist: matched
bite marks on victims buttocks
with Bundy’s front teeth.
Convicted.
Executed: 1989.
http://www.youtube.com/watch?v=HxQ1QFUGKqo
Forensic Science:
Is the application of science to the criminal and civil
laws that are enforced by police agencies in a
criminal justice system.
Criminalistics:
The broad term describing the wide range of skills,
training, and responsibilities needed in conducting
criminal investigations.
Criminalists:
Do Not-
carry weapons
interrogate suspects
make arrests
treat injured
Docollect evidence
Trace Evidence Examiner
Pathologist
Fingerprint Examiner
Forensic:
Pathologist
Anthropologist
Odontologist
Entomologist
Psychologist
Serologist
Mammologist
Physicist
Biologist
Toxicologist
Botanist
Sir Arthur Conan Doyle
Sherlock Holmes 7 Rules of Scientific Thinking: (compiled by John C. Sherwood)
1: “One should always look for a possible alternative and provide against it. It is
the first rule of criminal investigation."
2: "I never guess. It is a capital mistake to theorize before one has data.
Insensibly one begins to twist facts to suit theories, instead of theories to suit
facts."
3: "Use your time sparingly. Determine what you have. Then determine what
you need. Then look for what you need in the place where it must be."
4: “There is nothing so important as trifles. Never trust to general impressions,
but concentrate yourself upon details."
5: "Singularity is almost invariably a clue."
6: "It is a mistake to confound strangeness with mystery. The most
commonplace crime is often the most mysterious, because it presents no new
or special features from which deductions may be drawn."
7: "When you have eliminated the impossible, whatever remains, however
improbable, must be the truth."
http://www.youtube.com/watch?v=ZoPw2SaEq9k
Qualitative vs
Quantitative
EVIDENCE
Qualitative Evidence
Quantitative Evidence
Deals with descriptions.
Data can be observed but not measured.
Colors, textures, smells, tastes, appearance,
beauty, etc.
Qualitative → Quality
Deals with numbers.
Data which can be measured.
Length, height, area, volume, weight, speed,
time, temperature, humidity, sound levels,
cost, members, ages, etc.
Quantitative → Quantity
Qualitative data:
Quantitative data:
robust aroma
12 ounces of latte
frothy
appearance
serving temperature 150º F.
strong taste
serving cup 7 inches in
height
burgundy cup
cost $4.95
Physical Evidence and Faulty Logic
“She’s a witch! Burn her!
http://www.youtube.com/watch?v=zrzMhU_4m-g
Faulty Reasoning:
1. All wooden things burn but not all
things that burn are made of
wood, so a flammable witch cannot be wooden.
that float don’t need to
2. Objects
weigh the same; they merely
need to be less dense than water.
(Be wary of very small rocks).
Cautionary Tale: Faulty reasoning can sometimes
be introduced into court proceedings as a means of
swaying the jury. Antidote: Physical Evidence
Alphonse Bertillon (18531914) was a French law
enforcement officer and
biometrics researcher who
created anthropometry,
an identification system
based on physical
measurements.
Anthropometry was the first scientific
system police used to identify criminals.
Until this time, criminals could only be
identified based on eyewitness
accounts, which are known to be
unreliable. The method was eventually
supplanted by fingerprinting but "his
other contributions like the mug shot
and the systematisation of crime-scene
photography remain in place to this
day."
The “MUG SHOT
Edmond Locard
Twentieth century
French criminalistics
pioneer.
Locard’s Exchange
Principle
When two objects come in
contact with each other, a
cross-transfer of materials
occurs.
Forensic Chemistry
Is a broad term denoting the application of
chemical analyses and related principles to
the examination of physical evidence such as:
Street drugs
Gunshot residue
Arson debris
Paint
Fibers
Glass
Appropriate analytical and instrumental
techniques are chosen to identify physical
characteristics or composition of evidence.
Questions to be resolved include:
Is the substance illegal to possess?
Were these substances use in the
process to manufacture illegal drugs?
Were these items in physical contact?
Do the items share a common source?
Bertillonage
Materials: string
pen
meter stick
unique # card
Anthropometric Measurement sheet
Bertillonage Measurement Diagram
Procedure:
Using the Anthropometric Measurement Sheet, work with a
partner to get each other measurements and fill out the
data.
All measurements must be in centimeters.
Leave the “Unique I.D.” blank.
Upon completion of measurement activity, each student
must pick out a card from the box and get a secret I.D.
number.
Fill out the Unique I.D. section on your own Anthropometric
Sheet and write your name on the back of the I.D. card.
Hand in both to instructor.