What is chain of custody and why is it important for physical evidence?

• A. Documentation of who collected and handled evidence to preserve integrity.
• B. A chain of security guards who validated a visitor.
• C. A schedule for rotating patrols.
• D. A method for locking doors.

Answer: (A)

Chain of custody is the documented, verifiable record of who collected and handled physical evidence, from collection to presentation in court, to preserve its integrity. This creates a clear, chronological trail that shows where the evidence has been, who has touched it, and what was done to it at each step. By logging dates, times, handlers, locations, packaging, transfers, and any analyses, it demonstrates that the evidence remained authentic and untampered throughout the process. If the chain is broken or unclear, the evidence can be challenged or deemed inadmissible, undermining its value in investigations or trials.

In practice, this is supported by tamper-evident packaging, proper labeling, secure storage, and a log or digital record where each transfer or action is signed and timestamped. While other options describe general security measures (such as validating a visitor, rotating patrols, or locking doors), they do not address the specific need to prove the provenance and integrity of physical evidence.