Closed-ended questions should be used when:

Closed-ended questions are particularly effective when the goal is to obtain specific, concise responses, often from a witness who may not provide complete answers otherwise. By using closed-ended questions, the interviewer can prompt the witness to give straightforward replies, usually requiring a simple "yes" or "no," or selection from a limited set of responses. This approach helps to clarify information that may be vague or incomplete, ensuring that critical details are captured accurately.

In scenarios where a witness' initial responses are lacking in detail or clarity, closed-ended questions can help guide the conversation towards the specific information needed, making it easier to fill in gaps or resolve ambiguities in their testimony. This strategy is beneficial for gathering structured data efficiently, particularly in investigative or legal contexts where precise documentation is essential.