In regard to evidence preservation, which container is acceptable for items that must be aired out?

When preserving evidence that requires airing out, a paper bag is a suitable choice. Paper allows for airflow, which is crucial for preventing moisture buildup and the associated risks of mold and degradation of the evidence. This is especially important for biological materials or items that may emit odors, as these can deteriorate or contaminate if sealed in a non-breathable environment.

Plastic bags and airtight containers create an environment that traps moisture and gases, which can alter the condition of certain types of evidence, particularly organic materials. Glass containers, while better than plastic in some cases due to their non-reactive nature, are also not breathable and do not allow for the ventilation required for certain types of evidence. Therefore, the use of a paper bag effectively balances protection from contamination while maintaining the necessary airflow to preserve the integrity of the evidence.