Final answer:
When identifying fibers, synthetic fibers are usually made from polymers and not biodegradable, while animal fibers come from natural sources and are biodegradable. Trilobal fibers indicate a synthetic source due to their unique structure. To find additional evidence, officers should document, collect, interview, and consult experts.
Step-by-step explanation:
When identifying synthetic fibers versus animal fibers, there are several characteristics to look for. Synthetic fibers are usually made from polymers and are not biodegradable. They can be easily shaped, have specific properties like softness and water repellency, and are not soluble or low melting. Animal fibers, on the other hand, are natural and biodegradable. They come from animal sources like sheep, silk worms, and goats. They have specific characteristics like warmth, breathability, and moisture-wicking properties.
A trilobal fiber usually indicates a synthetic source. Trilobal fibers have a three-lobed structure, which gives them a unique appearance and improves their light reflection and luster. They are commonly used in textiles to create a shiny and aesthetically appealing effect.
To find additional evidence in the crime scene, the officers in charge or supervisors should follow several steps:
- Thoroughly document and photograph the scene to preserve evidence.
- Collect and properly package any other fibers found for further analysis.
- Interview witnesses or suspects to gather information about any potential sources of the fibers.
- Consult forensic experts or laboratories for specialized analysis of the fibers.