Which practices maintain evidence integrity during a mishap investigation?

• A. Distributing evidence to multiple labs without records.
• B. Describing evidence verbally only without documentation.
• C. Separate, labeled containers; documented chain of custody; secure storage; and version-controlled analyses.
• D. Storing evidence in unsecured locations.

Answer: (C)

Maintaining evidence integrity requires traceable, controlled handling from collection through analysis. Using separate, labeled containers prevents cross-contamination and mix-ups, so each item stays distinct and identifiable. A documented chain of custody records every transfer and who handled the evidence, creating an auditable history that can be trusted in investigation findings. Secure storage protects the evidence from tampering, loss, environmental damage, or unauthorized access. Version-controlled analyses keep track of any processing steps or data edits, preserving the original evidence and providing a clear, reproducible trail of how conclusions were reached. Together, these practices create a reliable, defensible record that supports accurate reconstruction of the mishap.

Distributing evidence to multiple labs without records, describing evidence verbally only without documentation, or storing evidence in unsecured locations all undermine integrity by breaking traceability, allowing misinterpretation, or risking loss or tampering.