The following excerpt is from Olagues v. Russoniello, 797 F.2d 1511 (9th Cir. 1986):
The majority also neglects to respect the special limitations on our power to enjoin criminal investigations by the executive branch of our government. See Olagues I, 770 F.2d at 799-801. "[A] court may not exercise its 'supervisory power' in a way which encroaches on the prerogatives of [a prosecutor] unless there is a clear basis in fact and law for doing so." United States v. Chanen, 549 F.2d 1306, 1313 (9th Cir.), cert. denied, 434 U.S. 825, 98 S.Ct. 72, 54 L.Ed.2d 83 (1977).
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