SEC. 33. And be it further enacted, That for any crime or offence against the United States, the offender may, by any justice or judge of the United States, or by any justice of the peace, or other magistrate of any of the United States where he may be found agreeably to the usual mode of process against offenders in such state, and at the expense of the United States, be arrested, and imprisoned or bailed, as the case may be, for trial before such court of the United States as by this act has cognizance of the offence. And copies of the process shall be returned as speedily as may be into the clerks office of such court, together with the recognizances of the witnesses for their appearance to testify in the case; which recognizances the magistrate before whom the examination shall be, may require on pain of imprisonment. And if such commitment of the offender, or the witnesses shall be in a district other than that in which the offence is to be tried, it shall be the duty of the judge of that district where the delinquent is imprisoned, seasonably to issue, and of the marshal of the same district to execute, a warrant for the removal of the offender, and the witnesses, or either of them, as the case may be, to the district in which the trial is to be had. And upon all arrests in criminal cases, bail shall be admitted, except where the punishment may be death, in which cases it shall not be admitted but by the supreme or a circuit court, or by a justice of the supreme court, or a judge of a district court, who shall exercise their discretion therein, regarding the nature and circumstances of the offence, and of the evidence, and the usages of law. And if a person committed by a justice of the supreme or a judge of a district court for an offence not punishable with death, shall afterwards procure bail, and there be no judge of the United States in the district to take the same, it may be taken by any judge of the supreme or superior court of law of such state.