Why are staples not advisable for packaging evidence?

Packaging evidence is a critical process in forensic analysis, and the method of securing that evidence can impact its integrity. Staples are not advisable because small items or trace evidence may fall out of the packaging. When small evidence is placed in a container that is secured by staples, the potential exists for those small items to become dislodged or fall out when handling, transporting, or transferring the evidence.

This is especially important because trace evidence, which may include hairs, fibers, or small particles, can be barely visible and easily lost if they are not secured in a way that prevents movement. Using envelopes or containers that can be sealed without risk of loss—such as heat-sealed bags or tamper-evident tape—helps ensure that all evidence is preserved and accounted for. The concerns associated with staples emphasize the need for secure and appropriate evidence packaging methods that safeguard the chain of custody and maintain the integrity of the evidence being collected.

Other potential issues with staples such as corrosion or difficulty in removal, while relevant, are secondary to the primary concern of preserving small, trace evidence effectively. Therefore, the selection of packaging materials must prioritize evidence security to prevent loss or contamination.