Which container is preferred for arson evidence to minimize contamination?

• A. Plastic Evidence Bag
• B. Aluminum Tin Can With A Lid
• C. Glass Jar
• D. Cardboard Box

Answer: (B)

In arson evidence, preserving volatile residues and preventing contamination is the priority. An airtight, nonporous container is best, and an aluminum tin can with a lid provides a tight seal that stops evaporation of accelerants and shields the sample from environmental smells and cross-contamination. Metal is durable and nonreactive with common residues, making it reliable for transport and storage. Plastic bags are porous and can allow vapors to escape or transfer residues; cardboard boxes can absorb liquids and odors, risking contamination; glass jars are inert but fragile and may not seal as securely in field conditions. So the aluminum tin can with a lid optimally protects the evidence and maintains its integrity for analysis.