Final answer:
Statement II and III are correct regarding trace evidence. Trace evidence plays a significant role today with modern forensic analysis, and criminals often try to destroy it.
Step-by-step explanation:
Both statement II and III are correct regarding trace evidence.
Statement II: Trace evidence plays a greater role today with the aid of modern forensic analysis. This is because advancements in technology and scientific techniques have made it possible to analyze tiny amounts of evidence that were previously undetectable. For example, DNA analysis can now link a suspect to a crime scene even with just a few skin cells or a single strand of hair.
Statement III: Criminals often seek to destroy trace evidence before leaving the crime scene. This is because they are aware of the potential of these small pieces of evidence to link them to the crime. For instance, criminals may try to wipe away fingerprints or dispose of items that could contain their DNA to avoid detection.