What material is preferred for packaging evidence to ensure breathability?

Using brown paper bags for packaging evidence is preferred because they allow for breathability. This is particularly important for biological evidence, such as clothing or bodily fluids, which can retain moisture if sealed in an airtight container. The breathability of brown paper helps prevent the growth of mold and the degradation of evidence by allowing airflow, which is crucial for preserving the integrity of such materials.

Plastic bags, on the other hand, can trap moisture, leading to potential contamination and degradation of the evidence. Cardboard boxes, while offering some level of breathability, do not provide the same level of protection as paper bags for smaller items. Glass containers are not breathable and can also pose risks of breakage, making them less suitable for packaging evidence that requires climate control. The characteristics of brown paper bags make them ideal for ensuring that evidence can be preserved in a manner that maintains its viability for forensic analysis.