Pierce Butler, Go-Bart Importing Company v. United States…
“ The United States attorney and the special agent in charge, as officers authorized to conduct such prosecution and having control and custody of the papers for that purpose, are, in respect of the acts relating to such prosecution, alike subject to the proper exertion of the disciplinary powers of the court. And on the facts here shown it is plain that the district court had jurisdiction summarily to determine whether the evidence should be suppressed and the papers returned to the petitioners. ”
