text: FM 2-22.3 _________________________________________________________________________________
  allegation, the source makes a genuine and detailed effort to establish or
  substantiate his true identity. In so doing, he may provide the HUMINT
  collector with information and leads for further development. The HUMINT
  collector should initially refuse to believe the source and insist he is the
  individual wanted by the ambiguous higher authorities. This will force the
  source to give even more detailed information in order to convince the
  HUMINT collector he is who he says he is.
  8-59. Repetition. (Interrogation) The repetition approach is used to induce
  cooperation from a hostile source. In one variation of this approach, the
  HUMINT collector listens carefully to a source's answer to a question, and
  then repeats the question and answer several times. He does this with each
  succeeding question until the source becomes so thoroughly bored with the
  procedure, he answers questions fully and candidly to satisfy the HUMINT
  collector and gain relief from the monotony of this method. The repetition
  technique must be judiciously used, as it will generally be ineffective when
  employed against introverted sources or those having great self-control. It
  may also provide an opportunity for a source to regain his composure and
  delay the collection effort. In this approach, the use of more than one
  HUMINT collector or a tape recorder has proven effective.
  8-60. Rapid Fire. (Interrogation) The rapid-fire approach is based upon the
  principles that—
  • Everyone likes to be heard when he speaks.
  • It is confusing to be interrupted in mid-sentence with an unrelated
  question.
  8-61. This approach may be used by one, two, or more HUMINT collectors to
  question the source. In employing this technique, the HUMINT collectors ask
  a series of questions in such a manner that the source does not have time to
  answer a question completely before the next one is asked. This confuses the
  source, and he will tend to contradict himself as he has little time to
  formulate his answers. The HUMINT collectors then confront the source with
  the inconsistencies causing further contradictions. In many instances, the
  source will begin to talk freely in an attempt to explain himself and deny the
  HUMINT collector’s claims of inconsistencies. In this attempt, the source is
  likely to reveal more than he intends, thus creating additional leads for
  further exploitation. This approach may be orchestrated with the emotional-
  pride and ego-down or fear-up approaches. Besides extensive preparation,
  this approach requires experienced and competent HUMINT collectors, with
  comprehensive case knowledge and fluency in the source's language.
  8-62. Silent. (Interrogation) The silent approach may be successful when
  used against either a nervous or confident source. When employing this
  technique, the HUMINT collector says nothing to the source, but looks him
  squarely in the eye, preferably with a slight smile on his face. It is important
  not to look away from the source but force him to break eye contact first. The
  source may become nervous, begin to shift in his chair, cross and re-cross his
  legs, and look away. He may ask questions, but the HUMINT collector should
  not answer until he is ready to break the silence. The source may blurt out
  questions such as, "Come on now, what do you want with me?" When the
  HUMINT collector is ready to break silence, he may do so with questions