Crime Scene PowerPoint

1. CSI II
CJAD 340
Tim Wilson
(417)625-9572
Wilson-T@mssu.edu
Chapter 1 - Introduction
Crime Scene Investigation II Tim
Wilson MSSU

2. Crime Scene Processing
All crimes have some form of a “scene”.
Focus of CSI I vs. II. Processing consists of the
examination and evaluation of the scene and any
evidence found there for the express purpose of
documenting the scene context and recovering the
evidence.
Crime Scene Investigation II Tim Wilson MSSU

3. Crime Scene Investigation and Police
Objectives
Two major objectives of the CSI
Crime repression: When crime prevention fails,
the police seek to repress the criminal by actively
investigating crime and bringing the criminal to
justice.
Protection of personal liberty. They do this in a
manner that ensures their methods and practices
abide by the constitution and the law.
Crime Scene Investigation II Tim Wilson MSSU

4. Evidence Defined
From CSI I-
Any material that may aid in determining the
truth during an investigation. Physical Evidence
Can Prove:
There are two basic forms in which evidence
comes to the investigation. They are:
Testimonial evidence: admissions, confessions
and statements by parties involved in the
investigation.
Physical evidence: tangible objects that are
collected and or documented.
Crime Scene Investigation II Tim Wilson MSSU

5. Testimonial vs. Physical
Both forms of evidence are important
and neither can be excluded.
Crime Scene Investigation II Tim Wilson MSSU

6. Testimonial Evidence
Testimonial evidence comes from people and as such is
subject to alteration. People may:
Purposefully lie to investigators or the court.
Misperceive events and report those misperceptions.
Unknowingly fill in the blanks in their perceptions
Remember the little magic trick in CSI I?
Testimonial evidence is always taken with a grain of salt.
It is known that even the most well intentioned
witness will not be 100% accurate
Crime Scene Investigation II Tim Wilson MSSU

7. Physical Evidence
Physical evidence is real and tangible, we can
put our hands on it or we can see it (sometime
with mechanical aid)
Physical evidence will never lie.
We can misinterpret it or be misled by it, but
that is a human factor and not associated to
the evidence itself.
Crime Scene Investigation II Tim Wilson MSSU

8. The Jigsaw Puzzle Analogy
Physical evidence can be likened to
pieces of a jigsaw puzzle.
Having the pieces means little, until we
can put them back in order.
This means recognizing
the context of the evidence.
Looking at the Box
Crime Scene Investigation II Tim Wilson MSSU

9. Defining an Objective Picture of the Event
By evaluating the context of evidence we may be
able to put the pieces in order and gain an
understanding of how they came to be there.
The goal of crime scene
investigation is under-
standing the evidence, not
simply collecting it.
Crime Scene Investigation II Tim Wilson MSSU