What is considered firsthand information?

Firsthand information refers to knowledge or data that is directly acquired through personal experience or observation without any intermediary sources. The correct choice highlights that firsthand information is information witnessed directly by the officer. This type of information carries significant weight in legal contexts because it reflects the officer's own observations, ensuring a high level of accuracy and reliability.

In contrast, other options represent indirect sources of information. Data collected from police reports, for instance, involves compiling and interpreting information that has already been reported by others, which means it is not firsthand. Information from another person's account also falls into a secondary category, as it relies on someone else’s perception or recollection of an event. Similarly, details from anonymous tips do not originate from direct observation and can vary in credibility. Thus, the essence of firsthand information lies in the direct, untarnished experience of the officer, making the choice regarding firsthand knowledge clearly articulated and accurate.