Lecture: Trace Evidence. To collect trace evidence, investigators need to know where to look and have the right tools. Types of Trace Evidence 1. Hair 2. Fibers (Natural vs. Synthetic) 3. Paint 4. Glass 5. Soil.
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Fibers (Natural vs. Synthetic)Natural Fibers come from animals and plants such as wool and cotton.Synthetic Fibers are man-made and under a microscope they have a uniformed shape.
Glass, soil, and paint are made from various combinations and concentrations of substances. These various concentrations can determine the origin of the material.