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NCJRS Abstract

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NCJ Number: 40914 Find in a Library
Title: DETECTION OF GUNSHOT RESIDUES ON HANDS BY SCANNING ELECTRON MICROSCOPY
Journal: JOURNAL OF FORENSIC SCIENCES  Volume:22  Issue:2  Dated:(APRIL 1977)  Pages:279-287
Author(s): J ANDRASKO; A C MAEHLY
Corporate Author: American Soc for Testing and Materials
Promotions Manager
United States of America
Date Published: 1977
Page Count: 9
Sponsoring Agency: American Soc for Testing and Materials
West Conhohocken, PA 19428-2959
Format: Article
Language: English
Country: United States of America
Annotation: THE SHORTCOMINGS OF FLAMELESS ATOMIC ABSORPTION SPECTROSCOPY (FAAS) AND NEUTRON ACTIVATION ANALYSIS (NAA) IN DETECTING GUNSHOT RESIDUES IS CONTRASTED WITH THE NEW TECHNIQUE OF SCANNING ELECTRON MICROSCOPY (SEM).
Abstract: FAAS AND NAA MAKE USE OF ONLY ONE CRITERION FOR THE PRESENCE OF GUNSHOT RESIDUES: THE CHEMICAL COMPOSITION OF THE ENTIRE SAMPLE TAKEN FROM THE FIRING HAND. SEM MAKES IT POSSIBLE TO ESTABLISH A FURTHER CRITERION: THE SHAPE AND APPEARANCE OF THE INDIVIDUAL PARTICLE. ONLY THOSE OBJECTS WHICH LOOK LIKE POTENTIAL GUNSHOT RESIDUES ARE ANALYZED. THE COMBINATION OF THESE CRITERIA INCREASES THE ACCURACY OF THE DETERMINATION. THIS ARTICLE EVALUATES THE SEM TECHNIQUE UNDER A VARIETY OF CIRCUMSTANCES AND WITH AN ASSORTMENT OF AMMUNITION. THE SEM TECHNIQUE WAS FOUND TO BE SUPERIOR TO OTHER TECHNIQUES, ESPECIALLY WHEN THE SAMPLES WERE COLLECTED A LONG PERIOD OF TIME AFTER THE ACTUAL SHOOTING....MSP
Index Term(s): Comparative analysis; Electron microscopy; Evidence collection; Evidence identification; Gunshot residue; Neutron activation analysis; Scientific techniques; Trace evidence
To cite this abstract, use the following link:
http://www.ncjrs.gov/App/publications/abstract.aspx?ID=40914

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