The first evidence to be collected at a crime scene should be evidence that could be what?

The rationale for collecting evidence that could be easily lost by time or elements is rooted in the principle of preserving the integrity of a crime scene. Certain types of evidence, such as biological samples or fragile items, can deteriorate or be contaminated quickly due to environmental factors, handling, or simply the passage of time. By prioritizing the collection of such evidence, investigators can ensure that critical information is secured before it becomes compromised or unavailable.

In contrast, evidence that is clearly visible to bystanders may not necessarily require immediate collection since it can be maintained in situ for a time. Evidence identified by law enforcement or known to witnesses, while important, may still remain intact for the duration of the investigation, thus allowing for a more systematic approach to evidence collection afterward. Focusing on evidence that is at risk of being lost helps establish a more solid foundation for the investigation, ultimately leading to a better understanding of the crime.