What are trace materials?

Trace materials refer to small pieces of evidence that can be collected from a crime scene or from a person, which play a crucial role in forensic investigations. These materials often include items such as hair, fibers, paint, glass, soil, or other substances that are not biological in nature but can still provide significant insights into the circumstances surrounding a crime.

The importance of trace materials lies in their ability to link a suspect or victim to a crime scene through the examination of these small, often overlooked pieces of evidence. For instance, if trace fibers from a suspect's clothing are found at a crime scene, they can serve as a compelling connection when analyzed properly.

In contrast, the other options describe different types of evidence or materials that do not accurately capture the essence of what trace materials are. Large pieces of evidence, materials used for processing evidence, and human remains all pertain to different aspects of criminal investigations and do not reflect the specific and critical category of trace evidence, which is pivotal in forensic analysis.