; and (D) the parolee shall have an opportunity to be apprised of the evidence against the parolee and, if the parolee so requests, to confront and cross-examine adverse witnesses, unless the Commission specifically finds substantial reason for not so allowing. (3) Subpoenas For purposes of paragraph (1), the Commission may subpoena witnesses and evidence, and pay witness fees as established for the courts of the United States. If a person refuses to obey such a subpoena, the Commission may petition a court of the United States for the judicial district in which such parole proceeding is being conducted, or in which such person may be found, to request such person to attend, testify, and produce evidence. The court may issue an order requiring such person to appear before the Commission, when the court finds such information, thing, or testimony directly related to a matter with respect to which the Commission is empowered to make a determination under this section. Failure to obey such an order is punishable by such court as a contempt. All process in such a case may be served in the judicial district in which such a parole proceeding is being conducted, or in which such person may be found. (b) Conviction of crimes while on parole (1) In general Conviction for a Federal, State, or local crime committed subsequent to release on parole shall constitute probable cause for purposes of subsection (a). (2) Parolees incarcerated If a parolee has been convicted of a Federal, State, or local crime and is serving a new sentence in an institution, a parole revocation warrant or summons issued under section 3642 may be placed against the parolee as a detainer. Not later than 180 days after the Commission receives notice of the placement of a detainer, the detainer shall be reviewed by the Commission. The parolee shall receive notice of the pending review, have an opportunity to submit a written application containing information relative to the disposition of the detainer, and, unless waived, shall have counsel as provided