What is chain of custody, and why is it critical?

• A. A chain of custody is a procedure for securing a crime scene before transport.
• B. The documented, chronological record of each person who handled the evidence; ensures integrity for court.
• C. It is a list of all evidence items collected at the scene.
• D. It is a digital log used to track access to the evidence locker.

Answer: (B)

Chain of custody is the documented, chronological record of every person who has handled the evidence from the moment it is collected until it is no longer in use. It tracks each transfer, who was responsible, when and where it occurred, and notes the condition of the item along the way. This record is essential because it preserves the integrity of the evidence and demonstrates that it has remained unchanged or properly accounted for throughout the investigation and potential court proceedings. If this trail is broken or incomplete, the evidence can be challenged as unreliable or inadmissible, which could undermine a case.

Securing a crime scene is important, but that focuses on scene protection rather than the ongoing handling of evidence. Simply listing all evidence items is an inventory, not the detailed transfer history. A digital log of locker access is a part of the record-keeping, but on its own it doesn’t capture every handoff or the condition notes that establish a continuous, verifiable chain of custody.