Which two methods are commonly used for collecting trace evidence?

Tape lifts and vacuum collection are widely recognized methods for collecting trace evidence because they effectively gather small particles or residues that may be crucial for forensic analysis.

Tape lifts utilize adhesive tape to capture trace evidence from surfaces, making them ideal for collecting hair, fibers, and other small particles. This method is non-destructive and allows for careful collection without contaminating the evidence. The layers of tape can be analyzed in a laboratory setting, providing valuable information about the materials or substances present.

Vacuum collection, on the other hand, involves the use of a vacuum device equipped with a filter or collection bag to suck up trace evidence from larger areas, such as clothing, carpets, or surfaces at a crime scene. This method is particularly effective for collecting various forms of trace evidence, including fibers, soils, and paint particles. The vacuum captures a wider array of potential evidence compared to tape lifting alone, ensuring that even minute traces are not overlooked.

Both collection methods prioritize preserving the integrity of the evidence, minimizing contamination, and allowing for thorough analysis by forensic experts. This focus on detail makes these methods suitable for use in various investigative contexts.