jimtrue.com : school : CJT2141 : 03: Physical Evidence
Posted by Jim True on January 22, 2003 7:00 AM. Last Updated October 22, 2006 9:23 PM
Disclaimer for all material noted here is at the bottom of this web page.
Physical Evidence
1. Blood, semen, saliva
2. Documents
3. Drugs
4. Explosives
5. fibers
6. fingerprints
7. Firearms & Ammunitions
8. Glass
9. Hair
10. Impressions
11. Organs & Fluids
12. Paint
13. petroleum products
14. Plastic Bags
15. Plastic, Rubber and other polymers
16. Powder Residues
17. Serial Numbers
18. Tool Marks.
19. Soil & Minerals
20. Vehicle Lights
21. Wood and other Vegetative Matter.
Thorough Search & Thorough Documentation
Identification
- purpose the determination of the physical or chemical identity with as near
absolute certainty as existing analytical techniques will permit.
Comparison
- subjects a suspect specimen and a control specimen to the same tests and
examinations for the ultimate purpose of determining whether or not they have a common origin.
Characteristics -
Individual - you can associate to a common source with an extremely high degree of certainty.
Class - can only be associated with a group and never with a single source. Can
often be used to 'clear' a suspect.
Blood used to be class evidence, with DNA is now Individual Characteristics
Reconstruction - methods used to support a likly sequence of events by the
observation and evaluation of physical evidence as well as statements made by
those involved with the incident.
* Examples of Individual Physical Evidence - fingerprints, dna, DRUGS
* Class Evidence, tool marks, fibers, hair,
Expert Witness 'can render an opinion' 'experience, skill
Next 4 chapters very scientific in nature.
Disclaimer: These are MY notes taken from classroom lectures while I'm in the classroom. While I'm perfectly happy to share my notes with my classmates and I know I take very good notes, you should still make every effort to attend the class and TAKE YOUR OWN NOTES. I will not transcribe everything the instructor says in the classroom, and I will NEVER post pre-exam reviews. My notes will not replace the value of actually attending class and taking your own class notes.I also cannot attest to their accuracy, other than they are what was provided in the lecture; you should not reference my notes as "expert opionion" by any means, and if you notice an error or omission, please do me the favor of e-mailing me with the correction and I will re-post my notes. End of Disclaimer.