What steps help prevent deterioration of physical evidence after collection?

• A. Proper packaging, moisture control, restricted access, and timely submission to the appropriate facility
• B. Rely on memory to recall packaging
• C. Delay submission to the facility
• D. Store evidence outdoors for drying

Answer: (A)

Keeping physical evidence in its original condition from collection through analysis is essential. This means controlling the environment and handling to prevent any change, contamination, or loss of trace material. Proper packaging creates a sealed, clean barrier that protects the item and preserves any residues or impressions. Moisture control prevents mold, rust, or degradation that can blur results or make analysis impossible. Restricting access maintains the chain of custody, reducing the risk of tampering or inadvertent contamination. Submitting the item to the appropriate facility in a timely manner minimizes the window during which deterioration can occur and ensures storage conditions remain appropriate for the type of evidence.

Relying on memory for how packaging was done is unreliable and can lead to inconsistent handling. Delaying submission allows deterioration and potential tampering to go unchecked. Outdoor storage exposes evidence to weather, pests, and environmental contaminants, all of which damage it.