text: FM 2-22.3 _________________________________________________________________________________
  5-59. The standard MP security and internment functions are the only
  involvement the MPs have in the interrogation process. MPs will not take
  any actions to set conditions for interrogations (for example, “softening up” a
  detainee). For purposes of interrogation, military working dogs will not be
  used.
  5-60. MPs may support interrogators as requested for detainee custody,
  control, escort, and/or additional security (for example, for combative
  detainees). When interrogators promise an incentive to a detainee, the
  interrogators must coordinate with the MPs to ensure that the detainee
  receives the incentive and is allowed to retain it. MPs may provide
  incentives in support of interrogation operations under the following
  conditions:
  • Using incentives is coordinated with and approved by the MP facility
  commander.
  • Providing and withdrawing incentives does not affect the baseline
  standards of humane treatment. This means that MPs can provide
  incentives such as special food items. However, when the incentive is
  withdrawn, the MPs still must provide the normal rations.
  • Using incentives does not violate detainee custody and control or
  facility security. This means that if a HUMINT collector requests MPs
  to provide an incentive (for instance, specialty food) but the detainee
  has been spitting on the guards, then MPs would not provide the
  incentive because it might reinforce inappropriate behavior.
  5-61. MPs exercise the overall responsibility for the safety of detainees, even
  in those cases in which detainees are in the temporary custody of HUMINT
  collectors or other agency personnel for the purpose of interrogation.
  HUMINT collectors should arrange with the MP supervisor to debrief MP
  guards. Guards who observe and interact with detainees can report the
  detainees’ disposition, activities, mood, and other observable characteristics.
  5-62. HUMINT collectors conduct interrogations for intelligence information.
  They normally work within the confines of the detainee detention facility, but
  have no involvement in the mission of the security of detainees. MPs follow a
  strict protocol concerning access to detainees. Accompanied and
  unaccompanied access to detainees must be coordinated and approved in
  advance by the MP commander responsible for the detainees or that
  commander’s designated representative.
  5-63. When HUMINT collectors coordinate for a detainee interrogation in an
  internment facility, the MPs escort the detainee to the interrogation site,
  which is collocated with, or located within the internment facility. MPs verify
  that the HUMINT collector is authorized access to the detainee. Depending
  on security concerns, the HUMINT collector may request that the MP
  remain, or he may request the MP depart until the detainee needs to be
  returned to the living area. If the MP remains, his functions are to maintain
  the security, accountability, and safety of the detainee and the safety of the
  interrogator, interpreter, and others in the interrogation site. The MP will
  perform no role in the interrogation. When conducting interrogations in a
  holding area such as a detainee collection point (DCP), MPs may not be
  available to provide security for interrogation operations. In that case, the