Why should plastic containers be avoided for evidence preservation?

Why should plastic containers be avoided for evidence preservation?

• A. Vapors may escape through plastic and cause contamination.
• B. Plastic containers are too expensive for evidence storage.
• C. Plastic containers can break easily during transit.
• D. Plastic containers are not widely available.

Answer: (A)

The primary concern with using plastic containers for evidence preservation is that vapors from the evidence can escape through the plastic. Many materials, especially volatile substances, release gases or vapors that can permeate through certain types of plastic. If these vapors escape, it can lead to contamination of the evidence, affect the integrity of the samples, and ultimately compromise an investigation. This contamination can hinder accurate analysis and lead to potential challenges in court. The other options do not address the critical issue related to the chemical and physical properties of the materials used for evidence preservation. Factors like cost, fragility during transit, and availability do not have the same significant impact on the preservation of evidence as the potential for vapor loss does. Thus, ensuring that evidence is stored in containers that adequately prevent vapor escape is essential for maintaining the integrity of the evidence collected.

The primary concern with using plastic containers for evidence preservation is that vapors from the evidence can escape through the plastic. Many materials, especially volatile substances, release gases or vapors that can permeate through certain types of plastic. If these vapors escape, it can lead to contamination of the evidence, affect the integrity of the samples, and ultimately compromise an investigation. This contamination can hinder accurate analysis and lead to potential challenges in court.

The other options do not address the critical issue related to the chemical and physical properties of the materials used for evidence preservation. Factors like cost, fragility during transit, and availability do not have the same significant impact on the preservation of evidence as the potential for vapor loss does. Thus, ensuring that evidence is stored in containers that adequately prevent vapor escape is essential for maintaining the integrity of the evidence collected.