debriefer

verb (used with object)

1. to interrogate (a soldier, astronaut, diplomat, etc.) on return from a mission in order to assess the conduct and results of the mission.
2. to question formally and systematically in order to obtain useful intelligence or information: Political and economic experts routinely debrief important defectors about conditions in their home country.
3. to subject to prohibitions against revealing or discussing classified information, as upon separation from a position of military or political sensitivity.
4. Psychology. (after an experiment) to disclose to the subject the purpose of the experiment and any reasons for deception or manipulation.

verb

1. (of a soldier, astronaut, diplomat, etc) to make or (of his superiors) to elicit a report after a mission or eventCompare brief (def. 13)

v.

“obtain information (from someone) at the end of a mission,” 1945, from de- + brief (v.). Related: Debriefed; debriefing.