Academic journal article Forensic Science Communications

Chapter 7: Fiber Examinations/preliminary Observations

Academic journal article Forensic Science Communications

Chapter 7: Fiber Examinations/preliminary Observations

Article excerpt

General Discussion

This module is intended as a guide to familiarize the trainee with fibrous evidence handling and mounting techniques. The trainee will be taught the proper visual and microscopical preliminary observations and examinations to distinguish between natural and manufactured fibers as broad categories.

Objectives

Upon satisfactory completion of this training module, the trainee will have developed and demonstrated theoretical knowledge and/or practical skills to:

1. select proper mounting media and tools for making these preliminary observations;

2. properly handle fibrous evidence during recovery, mounting, examination, and de-mounting while maintaining control and integrity of the items;

3. discern fiber shape, surface features, internal structure, and color, and apply accepted terminology to the features observed;

4. classify fibers as manufactured, animal or vegetable based on preliminary observation of the macroscopic and microscopic fiber features; and

5. measure fiber diameter and observe color and pleochroism.

Training Steps and Check Lists

1. Reading Assignments: Complete Chapter 7 reading assignments listed in Appendix I. …

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