Problems in Forensic
Forensic Science Goals
Ultimate Goal: linking of potential offender to a crime
scene by way of testimony
Central concept of FS is the Crime Scene.
4 crime scenes for every investigated
1. Physical crime scene c
2 major points:
indoor re alarm means to evacuate building
outdoor siren means to go to nearest building
and seek further info
For Lilly Hall:
Scene Investigation &
how do we document that which we
1. Develop investigative leads
2. Develop specific information to enable a
3. Locate pr
What is Science?
From 1st lecture:
study of natural phenomena
activity which aims to further
our understanding of why things
happen as they do in the natural world
How do we do Science?
Error, Quality & SOPs in
Lives at stake
need to be correct
innocent people die
High Stakes =
Electric Chair at Sing Sing Prison
Forensic Science Problems (218 Intro):
what do we photograph?
What Do We Photograph?
Electro Magnetic Spectrum
The Sun releases various wavelengths of en
Impression Evidence II
Marks made on or in a material by some type of tool.
Impression, cut, gouge, or abrasion caused by a
tool coming in contact with another object.
A tool mark can be caused by an endless
list of objects:
Different scene scales
Macroscopic Crime Scene, or Macroscene: The overall, or big
picture crime scene
Microscopic Crime Scene, or Microscene: scene based on the
types of evidence
Types of uids
There are various common types of uids of
Serology term used to describe a broad range of
laboratory tests using reactions of blood and ot
Quiz 9October 17-20 (covered on exam 2)
Quiz 7October 27-November 3 (Exam 3)
Friction Ridge Transfers
What are Fingerprints?
Friction Ridge Skin
Skin on the soles of the feet, plasm of the hands, and ngers in
humans and som
Aspects Related to the Preliminary Stages of an Investigation
What is Psychology?
Psychology is the systematic and scientic study of
behaviors and mental processes.
The eld is divided into two major groups:
Blood Pattern Analysis
Blood will Spatter and Splatter!
Spatter: to splash with small droplets; to distribute by
Splatter: an uneven shape or mess created by something
dispersing upon impact.
Spatter vs. Splatter
This is spatter i
Death as a Process
The study of death processes
biosphere to lithosphere
Taphonomic life history
in the forensic setting
Discuss the Scope of Questioned Documents
Explore the Writing Process
Briey Discuss a QD case
QD Not just Handwriting.
All questioned documents contain:
What is forensic science?
Introduction to Forensic Science
What does this mean?
of the law
study of natural phenomena
1. write thoughts on paper: 5 minutes
2. discuss with neighbors: 3 minu
Blood Spatter Patterns
We Are Not Dexter
Bloodstain Pattern interpretation
will Spatter not Splatter!
Spatter To sprinkle, like rain,
the act of splashing a liquid