Which of the following best defines a "known sample" in forensic science?

A "known sample" in forensic science refers to a sample that has established origins from a specific individual or entity. This means that the source of the sample is documented and verifiable, allowing forensic analysts to compare it with evidence from a crime scene or suspect. A known sample could be something like a blood sample taken from a person or hair collected from a specific individual, providing a baseline for comparison against unknown samples found at a crime scene.

In forensic investigations, the significance of known samples lies in their ability to create a direct link between a person and crime-related evidence. This can be crucial in proving or disproving involvement in criminal activity. In contrast, samples collected from random individuals, those taken from locations without clear connections, or samples that are non-testable do not provide the reliable point of reference needed for conclusive forensic analysis.