Discussion Post
There are several different types or classifications of evidence. Each type of evidence may have different requirements or methodology for handling them at the scene for it to be properly identified, documented, processed, and admissible at trial.
Prior to beginning work on this discussion, please review the following:
1) From the text:
a) Chapter 8: Pattern Evidence 1: General Patterns and Fingerprints
b) Chapter 9: Pattern Evidence 2: Firearms, Tool Marks and Document Analysis
2) From the free, downloadable resource at the web page Crime Scene Investigation Guide:
a) Section D - Completing and Recording the Crime Scene Investigation
b) Section E - Crime Scene Equipment
3) The articles:
a) An Automated Approach to the Classification of Impact Spatter and Cast-Off Bloodstain Patterns
b) Chemical Enhancement of Footwear Impressions in Blood Recovered from Cotton using Alginate Casts
4) From the free PDF copy at the web page Strengthening Forensic Science in the United States: A Path Forward (2009) :
a) Section 10. Automated Fingerprint Identification Systems
b) Section 11. Homeland Security and Forensic Science
5) From the video Bodies, Blood, and Ballistics: Forensics School, Part One :
a) Segment 2. Forensics: Blood Spatter 02:35
b) Segment 5. Blood Spatter and Trajectories 04:35
6) From the video Hands-On Police Work: Forensics School, Part Two :
a) Segment 3. Crime Scene Photography 02:27
b) Segment 6. How to Capture and Record Fingerprints 03:10
c) Segment 8. Crime Scene Documentation 03:18
You are also strongly encouraged to review the list of recommended resources, as they may assist you with this discussion forum and the The Difference Between Preliminary Field and Laboratory Testing assignment.
For students whose last names begin with
1) Identify the methods used in the identification of evidence (e.g., visual, black light, police dog, chemicals, electronics, etc.)
2) Describe at least three different methods involved in the identification of evidence.
3) Explain why these identification methods are appropriate for certain evidence but inappropriate for other types.
4) Explain how the identification methodology might affect laboratory testing.
5) Explain the requirements for the identification methodology related to admissibility of evidence at trial.
6) Each thread must also address health and safety issues at the scene and in handling evidence (e.g., explosives, drugs, biological, etc.)
The response should include a reference list. Using double-space, Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.