How does contamination affect evidence collection?

Contamination adversely affects evidence collection by introducing external substances or factors that can mislead investigators. When evidence is contaminated, it may alter the original state of the evidence or facilitate the introduction of foreign material, which can compromise the integrity of analysis. As a result, conclusions drawn from contaminated evidence may be inaccurate; they can lead to wrongful convictions or failures to identify the actual perpetrator of a crime. This is particularly critical in forensic science, where precision is paramount, as even minute alterations to physical evidence can significantly affect the outcomes of tests, interpretations, and ultimately, justice. Ensuring that evidence is uncontaminated is essential for maintaining the credibility and reliability of the investigation process.