What is the recommended approach for handling evidence that might be contaminated?

The recommended approach for handling evidence that might be contaminated is to use gloves and appropriate tools to minimize direct contact. This method is crucial in maintaining the integrity of the evidence. When handling potential evidence, it is essential to reduce the risk of contamination from skin oils, moisture, or other foreign substances that can alter or degrade samples. Wearing gloves not only prevents transfer of contaminants from the handler but also protects the handler from potential biological hazards present on the evidence.

Using appropriate tools allows investigators to manipulate or collect evidence without physical contact, further safeguarding the evidence from contamination. This practice is a standard protocol in crime scene investigations, ensuring that the evidence collected will remain as untouched and reliable as possible for subsequent analysis.

Other approaches, while possibly useful in certain contexts, do not prioritize contamination prevention as effectively. For instance, photographing evidence before handling can help document its original state but does not actively prevent contamination. Direct contact, even with careful handling, carries significant risk, while simply allowing evidence to air dry can lead to degradation and potential loss of evidentiary value. Thus, minimizing direct contact is the most effective strategy in evidence preservation.