When you interview a witness to a crime and ask a series of questions about what occurred, this is an example of a time when you debrief the witness.
Origin of debriefde- + brief
transitive verbde·briefed, de·brief·ing, de·briefs
- To interview (a government agent, for example) at the end of an assignment, especially to obtain intelligence or to provide instructions regarding information that should be kept secret.
- To meet with (one who has undergone a traumatic or stressful experience), especially for therapeutic or diagnostic purposes.
(third-person singular simple present debriefs, present participle debriefing, simple past and past participle debriefed)
de- + brief.