What is the purpose of the background interview?

• A. To interview only the primary witness at the scene.
• B. To interview someone who has relevant information not derived at the time of the event and to establish relationships.
• C. To test the credibility of the interviewee.
• D. To draft the final report.

Answer: (B)

The main idea is that a background interview gathers information from someone who has relevant knowledge not obtained at the time of the event and also helps build a rapport that can support ongoing information sharing. This approach widens the information net beyond the immediate scene, fills in gaps, and creates a trusting relationship with people who can provide useful context or leads later on. That combination—getting information from someone with later-available details and establishing a reliable connection—is why this option is the best choice.

Interacting only with the primary witness at the scene is too limited and misses other sources who can offer important context. Testing credibility is a separate part of evaluating information, not the primary purpose of a background interview. Drafting the final report comes after gathering and corroborating information, not from the interview itself.