What is the primary purpose of collecting evidence at a crime scene?

The primary purpose of collecting evidence at a crime scene is to assist in prosecution. This involves gathering physical items, biological samples, and other relevant materials that can establish the facts of the case and link a suspect to the crime or exonerate an innocent person. This evidentiary process is crucial in a courtroom setting, as the collected evidence is presented to support or refute claims made during a trial.

While creating a timeline of events, reconstructing the crime, and providing closure for families are all important aspects of crime scene investigation, they serve secondary or supportive roles in the broader goal of achieving justice. The primary focus remains on ensuring that the evidence collected can be effectively used to pursue legal actions against perpetrators of crime, thereby fulfilling the system's objective of upholding law and order.