Handling and processing evidence is an integral component of crime  scene management because it lays the foundation for everything the court  must consider when weighing the admissibility of evidence. For the most  part, the courts prefer testing being carried out in a laboratory  setting. However, there are exceptions, such as times when an initial  examination also yields valuable information. In this assignment, you  will differentiate between testing that might be done on-scene versus in  the laboratory, identify testing that might be subject to preliminary  testing, as well as compare the different results yielded by preliminary  field versus laboratory testing. Support your assignment with examples  from this week’s required material(s) and/or a minimum of three other  scholarly or credible resources and properly cite any references.
Prior to beginning work on this assignment, please review the following:

From the text: 

Chapter 8: Pattern Evidence 1: General Patterns and Fingerprints
Chapter 9: Pattern Evidence 2: Firearms, Tool Marks and Document Analysis

From the free, downloadable resource at the web page Crime Scene Investigation Guide (Links to an external site.): 

Section D – Completing and Recording the Crime Scene Investigation
Section E – Crime Scene Equipment

The articles: 

An Automated Approach to the Classification of Impact Spatter and Cast-Off Bloodstain Patterns
Chemical Enhancement of Footwear Impressions in Blood Recovered from Cotton using Alginate Casts

From the free PDF copy at the web page Strengthening Forensic Science in the United States: A Path Forward (2009) (Links to an external site.): 

Section 10. Automated Fingerprint Identification Systems
Section 11. Homeland Security and Forensic Science

The video Forensic Science: Analysis of Drugs Using Colour Tests (Links to an external site.) shown above
From the video Bodies, Blood, and Ballistics: Forensics School, Part One: 

Segment 2. Forensics: Blood Spatter 02:35
Segment 5. Blood Spatter and Trajectories 04:35

From the video Hands-On Police Work: Forensics School, Part Two: 

Segment 3. Crime Scene Photography 02:27
Segment 6. How to Capture and Record Fingerprints 03:10
Segment 8. Crime Scene Documentation 03:18

In your paper, address the following:

Identify what types of evidence might be subjected to preliminary or field testing.

Describe at least two types of testing that might be done on scene.

Differentiate between why some evidence can and should be subjected  to preliminary testing on scene, while other types should not.

Explain how the on-scene test compares to laboratory testing.

Compare and contrast the results yielded by preliminary field versus laboratory testing.

Compare and contrast the admissibility of on-scene versus laboratory testing at trial.

The Difference Between Preliminary Field and Laboratory Testing paper

Must be 750 words in length (not including title and references  pages) and formatted according to APA style as outlined in the Ashford  Writing Center’s APA Style (Links to an external site.).
Must include a separate title page with the following: 

Title of paper
Student’s name
Course name and number
Instructor’s name
Date submitted

For further assistance with the formatting and the title page, refer to APA Formatting for Word 2013 (Links to an external site.).
Must utilize academic voice. See the Academic Voice (Links to an external site.) resource for additional guidance.
Must include an introduction and conclusion paragraph. Your  introduction paragraph needs to end with a clear thesis statement that  indicates the purpose of your paper. 

For assistance on writing Introductions & Conclusions (Links to an external site.) as well as Writing a Thesis Statement (Links to an external site.), refer to the Ashford Writing Center resources.

Must use at least three scholarly, peer-reviewed, and/or credible sources in addition to the course text. 

The Scholarly, Peer-Reviewed, and Other Credible Sources (Links to an external site.)  table offers additional guidance on appropriate source types. If you  have questions about whether a specific source is appropriate for this  assignment, please contact your instructor. Your instructor has the  final say about the appropriateness of a specific source for a  particular assignment.

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