What is the primary role of corroborating evidence?

The primary role of corroborating evidence is to confirm or support initial evidence. Corroborating evidence enhances the credibility of existing evidence by providing additional information or data that aligns with the original findings. For example, if a witness testifies about a specific event, corroborating evidence such as video footage, photographs, or another witness's account can strengthen the validity of that testimony. This type of evidence is crucial in building a solid case, as it creates a more reliable narrative for investigators and keeps the integrity of the investigative process intact.

Other options do not accurately reflect the purpose of corroborating evidence. For instance, challenging existing evidence would imply disputing its validity rather than supporting it, while personal accounts may not necessarily provide the objective support needed. Additionally, serving as primary evidence contradicts the role of corroborating evidence, which is meant to enhance or support rather than stand alone as the main evidence in a case.