text: _________________________________________________________________________________FM 2-22.3
  developed a basic idea of the type and degree of information that an
  individual source should know. When the source’s answers show that
  he does not have the expected level of information (too much or too
  little or different information than expected), this may be an indicator
  of deceit. The HUMINT collector needs to determine the source of
  unexpected information.
  • Information is self-serving. Reporting of information that is self-
  serving to an individual or his group should be suspect. For example, a
  member of one ethnic group reporting generic atrocities by an opposing
  ethnic group or a source reporting exactly the right information needed
  to receive a promised incentive should be suspect. That is not to say
  that the information is necessarily false, just that the HUMINT
  collector needs to be sure to verify the information.
  • Lack of extraneous detail. Often false information will lack the detail
  of truthful information, especially when the lie is spontaneous. The
  HUMINT collector needs to ask follow-up questions to obtain the
  detail. When the source is unable to provide the details that they
  should know, it is an indicator of deceit. If the source does provide this
  additional information, it needs to be checked for internal
  inconsistencies and verified by repeat questions.
  • Repeated answers with exact wording and details. Often if a source
  plans on lying about a topic, he will memorize what he is going to say.
  If the source always relates an incident using exactly the same
  wording or answers repeat questions identically (word for word) to the
  original question, it may be an indicator of deceit. In an extreme case,
  if the source is interrupted in the middle of a statement on a given
  topic, he will have to start at the beginning in order to “get his story
  straight.”
  • Source appearance does not match story. If the source’s physical
  appearance does not match his story, it may be an indication of deceit.
  Examples of this include the source who says he is a farmer but lacks
  calluses on his hands or the supposed private who has a tailored
  uniform.
  • Source’s language usage does not match story. If the type of language,
  including sentence structure and vocabulary, does not match the
  source’s story, this may be an indicator of deceit. Examples of this
  include a farmer using university level language or a civilian using
  military slang.
  • Lack of technical vocabulary. Every occupation has its own jargon and
  technical vocabulary. If the source does not use the proper technical
  vocabulary to match his story, this may be an indictor of deceit. The
  HUMINT collector may require the support of an analyst or technical
  expert to identify this type of deceit.
  • Physical cues. The source may display physical signs of nervousness
  such as sweating or nervous movement. These signs may be indicators
  of deceit. The fact that an individual is being questioned may in itself
  be cause for some individuals to display nervousness. The HUMINT
  collector must be able to distinguish between this type of activity and
  nervous activity related to a particular topic. Physical reaction to a