Observational Skills
What is an eye witness ?
A person who has seen something related to crime and can communicate their observations.
What is the Chain of Custody ?
The documented and unbroken transfer of evidence between people.
State the Precautions for Avoiding Cross Contamination of Physical Evidence
Individually Wrapped and individually packaged
Name the three kinds if fingerprint patterns
Arches, whorles, and loops
What is the study of blood applied to crime?
Forensic Serology
What is observation?
Gathering info about what is around us, through our senses, sight, taste, hearing, smell, and touch
State the purpose of fiber evidence
To link a suspect, victim and crime scene
What percent of the population has the least common pattern. (5%)
Arch
What type of evidence is blood?
What are the most important tools of a Forensic investigator?
The ability to observe, interpret, and report observation clearly
What is a secondary crime scene?
A location other than the primary crime scene, but that is in some way related to the crime where evidence is found.
State the five most common types of trace evidence
Hair, Fiber, Glass, Paint, Soil
1. Finger Prints are individual characteristics
2. They are unchanged throughout life
3. They have individual ridge patterns that classify them.
What is plasma made out of?
Water, Proteins, nutrients, and wastes
How to be a good observer?
1. Must take conscience effort to examine our environment systematically
2. Observe everything, not matter how unimportant it may seem
3. Gather all the information
4. Write down and photograph everything
Every contact leaves a trace
State the FOUR Types of physical evidence
- Transient , Conditional, Pattern, Transfer
What does AFIS stand for and what is it?
(Automated Fingerprint Identification System)
Country Wide, scan and search fingerprints, maintained by the FBI
What blood type is the universal donor?
How is information processed in the brain? List 3 out 5 ways
1. Information from our senses
2. What we pay attention to
3. Perception
4. Short-term memory
5. Long-term memory
List the 4 of the 7 S’s of Crime Scene Investigation.
1. Secure the Scene
2. Separate the Witnesses
3. Scan the Scene
4. See the Scene
5. Sketch the Scene
6. Search for evidence
7. Secure and collect evidence
State the four Crime Scene Search Patterns
Strip, Zone, Grid, Spiral
What are physical methods of print development?
Powder Dusting, Magnetic brush, small partical reagent.
What are satellites?
Small secondary droplets around the main blood spatter drop.