Why should you use paper bags instead of plastic when collecting wet evidence?

• A. Mold forms in plastic
• B. Paper bags absorb moisture better
• C. Plastic is too heavy
• D. Paper bags are cheaper

Answer: (A)

When evidence is wet, you want packaging that won’t trap moisture and create a breeding ground for mold. Plastic bags seal in moisture, leaving a damp environment that encourages mold growth on fabrics, biological materials, and other trace evidence, which can alter or destroy what you’re trying to analyze. Paper bags are breathable, allowing moisture to escape and reducing mold risk, which helps preserve the integrity of the evidence for analysis. Paper bags may absorb some moisture, but the main advantage is that they prevent the moisture-heavy environment mold needs to thrive.