How should each item of evidence be packaged to prevent contamination?

Packaging each item of evidence separately is essential to prevent contamination because it ensures that no cross-contamination occurs between different pieces of evidence. Each item may carry distinct types of fingerprints, DNA, trace evidence, or other pertinent information that could be compromised if mixed with other items. By keeping them isolated, the integrity of each piece can be maintained, preserving the chain of custody and ensuring that each item can be individually analyzed without the risk of introducing foreign substances or altering the evidence.

Using single-use containers can also contribute to the preservation of evidence when handled correctly. However, packaging mixed items together or wrapping all items in a single bag greatly increases the risk of evidence contamination and could lead to challenges in court regarding the handling and integrity of the evidence. Proper packaging procedures are fundamental in forensic investigations and criminal justice processes.