When should an officer change gloves during evidence collection?

An officer should change gloves after collecting each item to prevent cross-contamination of evidence. Each item of evidence may contain different biological or chemical materials, and wearing the same gloves while handling multiple items can inadvertently transfer residues from one piece of evidence to another. This practice is essential to maintain the integrity of the evidence, ensuring that each item is preserved in its original state for proper investigation and legal processes.

Regular glove changes minimize the risk of compromising the evidence, thereby supporting the integrity of the entire evidence collection process. This procedure aligns with best practices in forensic science and evidence handling, which emphasize the importance of maintaining clear, uncontaminated samples for accurate analysis and successful prosecution.