In tiny letters in my old Army field manual: “No witnesses, no evidence, it didn’t happen!” I am kidding, of course, there is no telling what the new PC Army Field Manual says.
From the Army Field Manual on Intelligence Interrogation,
Appendix H - Approaches. It's wonderful we are telling the bad guys exactly what they can expect during interrogation and how far our interrogators can legally go...
FEAR UP (HARSH)
In the fear up (harsh) approach, the interrogator
behaves in a heavy, overpowering manner with a loud and threatening voice. The interrogator may
even feel the need to throw objects across the room to heighten the source's implanted feelings of fear. Great care must be taken when doing this so that any actions taken would
not violate the Geneva Conventions. This technique is to convince the source that he does indeed have something to fear and that he has no option but to cooperate. A good interrogator will implant in the source's mind that the interrogator himself is not the object to be feared, but is a possible way out of the trap. The fear can be directed toward reprisals by international tribunals, the government of the host country, or the source's own forces. Shouting can be very effective in this variation of the fear up approach.