Trace evidence: Difference between revisions

Revision as of 01:20, 2 October 2005

Revision as of 10:34, 16 October 2005

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'''Trace evidence''' is evidence that is found at a [[crime scene]] in small but measurable amounts. Examples of typical trace evidence include [[hair|hairs]], [[fiber|fibers]], [[soil|soils]], [[botanical]] materials, [[gunshot residue]], [[explosives]] residue, and volitile [[hydrocarbons]] ([[arson]] evidence). The most common instrument used in trace evidence analysis is the [[microscope|compound polarized light microscope]]. Gunshot residue may be identifiedidentifed by elemental analysis using an [[spectrophotometer|atomic absorption spectrophotometer]] or with a [[scanning electron microscope]]. Small amounts of explosives, volitile hydrocarbons, and other chemicals are identified with the use of analytical instruments, such as [[gas chromatography]], [[mass spectrometry]], and [[infrared spectroscopy]].

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