What is a potential source of contamination during evidence collecting?

Wearing gloves improperly presents a significant potential source of contamination during evidence collection. Gloves are intended to protect both the evidence and the evidence collector from contamination during the handling process. If gloves are worn incorrectly—such as being too loose, torn, or removed and replaced without proper hygiene protocols—there's a greater risk of transferring residues, fingerprints, or biological materials onto or from the evidence, which can compromise its integrity and reliability.

In contrast, documenting evidence with a notebook, using a camera for photographs, and interacting with witnesses are critical parts of the evidence collection process that, when done correctly, do not inherently lead to contamination. These actions are essential for maintaining a thorough record and understanding of the crime scene but do not directly alter the physical state of the evidence itself in the same manner as improper glove use would.