What is a known standard in forensic analysis?

A known standard in forensic analysis refers to material obtained from a verified source that is used for comparison against unknown samples. This standard is essential for establishing the characteristics and properties of evidence collected during an investigation. It allows forensic analysts to determine whether the unknown sample share similarities with the known standard, aiding in drawing conclusions about the evidence's origin or nature.

This concept is fundamental in various forensic disciplines, from DNA analysis to chemical composition comparison, as it provides a reliable baseline that facilitates accurate identification and analysis of forensic evidence. In contrast, evidence collected from crime scenes may vary in nature and quality, while intentionally contaminated samples and historical samples lacking documentation do not provide dependable comparisons and could lead to erroneous conclusions in a forensic analysis.