How should evidence be preserved at a scene?

• A. In any available bag without labeling.
• B. Exposed to air to dry.
• C. In appropriate containers with labels; avoid contamination.
• D. Placed directly on the ground for later pickup.

Answer: (C)

Preserving evidence relies on protecting its integrity through proper packaging and labeling. Evidence should be placed in containers appropriate for the item—ones that prevent leakage, contamination, or damage—and then sealed and clearly labeled with essential information so it can be tracked through the investigation. This also includes handling the items with clean techniques and minimizing contact to avoid introducing new contamination. The labeling should include case number, item description, date and time collected, location, and the collector’s name to maintain the chain of custody from scene to the lab. Choosing this approach prevents misidentification, degradation, or loss, which can occur if items are left unlabeled, exposed to air, or placed directly on the ground.