What practice helps minimize contamination and maintain integrity of evidence?

• A. Rely on memory and not document packaging.
• B. Transfer to unrelated persons.
• C. Re-use packaging between different items.
• D. Secure collection, proper packaging and labeling, minimizing contamination, and maintaining an auditable chain of custody.

Answer: (D)

Minimizing contamination and preserving evidence integrity comes from following a complete handling protocol: secure collection, proper packaging and labeling, minimizing contamination, and keeping an auditable chain of custody. Securing collection means gathering items in a controlled way with clean tools and PPE, preventing cross-contact with other items. Proper packaging and labeling protect the item and ensure traceability: use appropriate containers, seal with tamper-evident fasteners, and include clear identifiers, dates, case information, and collector details. Minimizing contamination involves limiting handling, using separate packaging for each item, and changing gloves or tools between items. An auditable chain of custody records every transfer or handling event with who, when, where, and why, so the evidence remains verifiable and admissible. Relying on memory and not documenting packaging invites errors and loss; transferring to unrelated persons breaks the chain of custody and risks contamination; re-using packaging can transfer residues and cause misidentification.