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NCJRS Abstract

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NCJ Number: 218649 Find in a Library
Title: Collection, Handling, and Identification of Glass
Corporate Author: Scientific Working Group for Materials Analysis (SWGMAT)
United States of America
Date Published: January 2005
Page Count: 5
Sponsoring Agency: Scientific Working Group for Materials Analysis (SWGMAT)
Quantico, VA 22135
US Dept of Justice Federal Bureau of Investigation
Quantico, VA 22135
Sale Source: US Dept of Justice Federal Bureau of Investigation
Laboratory Branch
2501 Investigation Parkway
Quantico, VA 22135
United States of America
Document: HTML
Type: Guideline
Format: Document (Online)
Language: English
Country: United States of America
Annotation: The Scientific Working Group for Materials Analysis presents guidelines for forensic glass examiners in their collection, handling, and identification of glass.
Abstract: All of the sampling techniques addressed in the guidelines are acceptable; however, one may be more appropriate than another depending on such circumstances as the nature of the crime scene or the analytical method to be applied to the glass sample. Guidelines for the forensic glass examiner's handling of glass samples address the following issues: general considerations in the collection of a glass sample; the collection of glass samples from garments, footwear, and other items of evidence; receiving glass evidence collected by another technician; cleaning glass samples; and considerations in crushing glass in the course of an analysis. Guidelines that address the analysis of glass samples focus on characterizing particles as glass. Some of the issues considered are distinguishing glass from plastic and other similar materials, as well as the use of a stereomicroscope with a polarizing attachment. One of the guidelines for analyzing glass advises that upon the completion of the initial screening, separation, and cleaning, samples can then be either analyzed immediately or retained for later analysis. A 2-item bibliography
Main Term(s): Police policies and procedures
Index Term(s): Chain of custody; Evidence collection; Forensic sciences; Glass analysis; Investigative techniques
Note: From Forensic Science Communications, N 1, V 7, January 2005; downloaded June 4, 2007. For related guidelines reports, see NCJ-218648 and 218650-52.
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