What is an example of trace evidence?

Trace evidence refers to small, often microscopic materials that are transferred from one location or object to another during a crime. This type of evidence can often provide crucial links between a suspect and a crime scene or victim. Human hair is a classic example of trace evidence because it can be transferred when individuals interact with one another or come into contact with objects in the environment. Even a single strand of hair can provide significant forensic information, such as potential matches to a suspect or insights about the victim.

In contrast, footprints left on the ground are considered more substantial evidence, as they often indicate the presence of a person at a specific location. A recording of a conversation provides audio evidence and can document actions or intentions but does not fall under the category of trace evidence. Eyewitness reports, while valuable for establishing context or corroborating events, are subjective accounts rather than physical evidence. Therefore, human hair is the best representation of trace evidence among the provided options.