Trace evidence refers to small, often microscopic materials that can be transferred from one location or object to another during a crime. This type of evidence includes items like hair, fibers, glass, and soil, which can help forensic scientists link a suspect to a crime scene or victim. In forensic investigations, trace evidence is collected and analyzed to provide valuable information. Techniques such as microscopy and chemical analysis are used to identify the composition and origin of these materials. By examining trace evidence, investigators can build a clearer picture of the events that took place, aiding in the pursuit of justice.