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NCJ Number: 142076 Find in a Library
Title: Trace Metal Detection Techniques in Law Enforcement
Corporate Author: US Dept of Justice
Law Enforcement Assistance Admin
United States of America
Date Published: 1970
Page Count: 16
Sponsoring Agency: National Institute of Justice/
Rockville, MD 20849
NCJRS Photocopy Services
Rockville, MD 20849-6000
US Dept of Justice
Washington, DC 20531
Sale Source: National Institute of Justice/
NCJRS paper reproduction
Box 6000, Dept F
Rockville, MD 20849
United States of America

NCJRS Photocopy Services
Box 6000
Rockville, MD 20849-6000
United States of America
Document: PDF
Type: Report (Technical Assistance)
Format: Document
Language: English
Country: United States of America
Annotation: This manual describes the technique for detecting and identifying traces and specific patterns left on suspects' skin and clothing by weapons, tools, and other metal objects.
Abstract: Research has determined that metal objects leave traces on skin and clothing surfaces in characteristic patterns, with intensities proportional to the interaction of weight, friction, or duration of contact with metal objects. The Trace Metal Detection Technique (TMDT) makes such metal trace patterns visible when skin or clothing is treated with a test solution and then is illuminated by ultraviolet light. The metal trace patterns appear as fluorescent colors on the hands or clothing of the suspect, allowing a police officer to determine whether the suspect has been in contact with certain metal objects, the type of metal or metals in the objects, and what type of object was probably involved. However, physical evidence obtained through the technique should be used as an adjunct to a complete investigation. Photographs and detailed description of equipment and procedures used
Main Term(s): Metal detection; Ultraviolet techniques
Index Term(s): Metal identification; Suspect identification; Trace evidence; Weapons; Weapons identification
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