Chemist using microscope to analyzetrace evidence
The Trace Analysis Unit examines and compares trace evidence in order to include or exclude possible sources of recovered materials. Typical examples include hairs, fibers, glass, paint, polymers, and fragments of metal. Commonly, these trace materials are recovered and initially examined by chemists in the Criminalistics Unit, who then forward the materials and standards collected from victims, suspects, and crime scenes to chemists in the Trace Analysis Unit for final examinations and comparisons.

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