Which of the following accurately describes a secondary caller?

A secondary caller is indeed someone who has heard something related to the incident. This type of caller does not necessarily witness the event unfold but may learn about it through various means, such as conversations with friends, family, or even through media reports. Their knowledge of the situation is often second-hand and may not have firsthand knowledge of the details.

This distinction is important in emergency response protocols, as secondary callers may provide information that can contribute to the overall understanding of the incident. However, their accounts may not be as reliable or detailed as those from eyewitnesses who have direct experience of the situation. This can help responders prioritize credible sources of information and address the situation effectively, ensuring that communication is clear and accurate as they assess the situation.