On June 29, 1988, a magistrate in the Northern District of Ohio issued five search warrants authorizing the search of business premises belonging to plaintiffs, White Fabricating Company (White) and Diversified Industries, Inc. (DI), and of a white van belonging to White, as well as the seizure of various business records of the appellants and a quantity of video tapes.
The warrants authorized the seizure of copies of some fifty video tapes, various banking records, all records pertaining to the purchase and maintenance of the fifty video tapes, and all records relating to correspondence and transactions between the plaintiffs and twenty-four organizations or persons affiliated or allegedly associated with plaintiffs in the videotape business. In addition, the warrants authorized the search for and seizure of any packages containing the fifty video tapes, any other information relating to these tapes, any records which identified individuals involved in the processing of the video tapes, various employment records, all records identifying owners, stockholders, or directors of the plaintiffs' business entities, U.S. currency, any records relating to the accounting of monetary profits obtained from “peep show” machines, any printing device used to make labels, a log book relating to the issuance of keys to the machines, and a certain rubber stamp.
The warrants were supported by a sixty-one-page affidavit signed by James Larkin, an FBI agent. The affidavit asserted that the plaintiffs were involved in a pattern of racketeering activity, interstate transportation of obscene material and transportation of obscene material for sale and distribution, conspiracy to defraud the United States, money laundering, and aiding and abetting in these criminal activities. The allegations contained in the affidavit were based on a six-month investigation by the FBI which involved the plaintiffs and two other companies. The investigation disclosed a pattern of weekly shipments of allegedly obscene video tapes from Cleveland, Ohio to adult book stores and peep shows throughout the United States.
The investigation revealed that DI manufactured video peep show booths which were subsequently installed in adult book stores. DI also supervised regional companies that oversaw peep show operations in their various geographic areas. These service companies would receive the video tapes, place them in a video machine in a peep show booth, occasionally service the machine, keep records of profits generated from the machines, and send back to DI a certain percentage of the proceeds generated. The investigation also revealed a meticulous method of accounting for profits which included the use of locked cash boxes which required keys to open, profit and balance sheet records, extensive use of cashier’s checks, and the disbursal of deposits of cash into a number of banks to avoid the $10,000 minimum reporting requirement imposed on these banks.
White was allegedly one of DI’s service companies. The investigation indicated that White was substantially engaged in the duplication, installation, and distribution of the allegedly obscene video tapes which were placed in the various peep shows booths. White would first receive approximately fifteen “master” video tapes, which White would duplicate, using some one hundred video cassette recorders.1 White’s employees would then package the video tapes for shipment to adult *407book stores scattered throughout the country.
Government agents, for five weeks, monitored the shipment of video tapes from White to a “cooperating witness,” an employee or associate of one of the plaintiffs. His particular job allegedly involved receiving the shipment of video tapes from White in Cleveland, and then installing the various duplicated video tapes in adult book stores in a particular city. On approximately June 1, 1988, this cooperating individual allegedly began to allow law enforcement officials to examine the video tape cassettes and to make copies of them for subsequent viewing. The government agents viewed seventy-five different tapes, drafting detailed written descriptions of the contents of fifty video tapes.
Based on this information, along with other information allegedly supplied by cooperating witnesses, Agent Larkin concluded that probable cause existed to support the search warrants authorizing the search of the plaintiffs’ premises. Written descriptions of the content of the allegedly obscene fifty video tapes were furnished to the magistrate, along with the extensive affidavit. Based on the affidavit, the fifty written descriptions, and after personally viewing four of the video tapes, the magistrate issued the warrants. Armed with the warrants, the FBI agents proceeded to search the premises of both DI and White and also White’s van. The searches yielded a substantial amount of United States currency, inventory sheets, employee records, rubber stamps with the names of some of the twenty-four listed companies, equipment installation schedules, accounts receivable information, floppy disks, deposit records, disbursement records, address books, seizure of one copy each of seventy-two video tapes not listed in the warrant, and the seizure of thirty-five “master” video tapes.
Finding probable cause for the issuance of the warrant and the seizure, the district court denied plaintiffs’ motion for return of the property seized during the search. White and DI appeal. We reverse and remand.
JURISDICTION
We first consider whether the district court had jurisdiction to entertain plaintiffs’ motions to return property pursuant to Rule 41(e) of the Federal Rules of Criminal Procedure and to set aside the court’s order to place under seal the search warrant and all associated documents. Rule 41(e) provides:
(e) Motion for Return of Property. A person aggrieved by an unlawful search and seizure may move the district court for the district in which the property was seized for the return of the property on the ground that such person is entitled to lawful possession of the property which was illegally seized. The judge shall receive evidence on any issue of fact necessary to the decision of the motion. If the motion is granted the property shall be restored and it shall not be admissible in evidence at any hearing or trial. If a motion for return of property is made or comes on for hearing in the district of trial after an indictment or information is filed, it shall be treated also as a motion to suppress under Rule 12.
Fed.R.Crim.P. 41(e) (1989).1A
The language of the rule may be read implicitly to authorize such motions to be made in the district court before a criminal prosecution has begun. See Hunsucker v. Phinney, 497 F.2d 29, 32 (5th Cir.1974), cert. denied, 420 U.S. 927, 95 S.Ct. 1124, 43 L.Ed.2d 397 (1975); United States v. Rapp, 539 F.2d 1156, 1160-61 (8th Cir.1976); and Mr. Lucky Messenger Service, Inc. v. United States, 587 F.2d 15 (7th Cir.1978);2 see also Pieper v. United States, 604 F.2d 1131, 1133 (8th Cir.1979) (“[T]he District Court’s equitable jurisdiction to suppress illegally obtained evidence before an indictment has been issued has been firmly es*408tablished.”) The courts which have found jurisdiction appropriate under inherent or equitable principles emphasize that such jurisdiction should be accepted only with caution and restraint. We hold that there is jurisdiction under the circumstances of this case, but we establish no per se rule to this effect.
Other courts have found jurisdiction in this type of situation by treating the motion as a civil complaint. See Grant v. United States, 282 F.2d 165, 168 (2d Cir.1960) and Boyd v. U.S. Dept. of Justice, 673 F.Supp. 660 (E.D.N.Y.1987). Sovereign News Co. v. United States, 690 F.2d 569 (6th Cir.1982), cert. denied, 464 U.S. 814, 104 S.Ct. 69, 78 L.Ed.2d 83 (1983), in which we cited and considered Hunsucker, involved the government’s retention of documents and materials which were allegedly obscene after the moving party had been acquitted of obscenity charges. We assumed jurisdiction in that case and affirmed, upon certain conditions, the action of the district court which had assumed jurisdiction of the motion. See also United States v. Giacalone, 541 F.2d 508 (6th Cir.1976) (en banc).
Based upon the authority above cited, we believe assumption of jurisdiction is warranted under equitable standards in this particular case and also because the plaintiffs’ motion here is, in effect, a civil action initiated after and during a criminal investigation. Therefore, we find that there is jurisdiction and now proceed to the merits.3
Comments to Rule 41(e) after the 1972 amendment indicate that “subdivision (e) provides for a return of the property if (1) the person is entitled to lawful possession and (2) the seizure was illegal.” Fed.R. Crim.P. 41(e) (Advisory Committee Notes) (emphasis in original). No one questions that plaintiffs possessed the property and tapes in question and that they were entitled to possession. The question at issue is the legality of the seizure.
CONSENT
We deal first with the issue of whether the plaintiffs consented to permit government agents to examine video tapes which plaintiffs had shipped to “peep show” booths for display to a paying public. The government has the burden to prove voluntary consent to a search or seizure in such situations by a preponderance of the evidence. United States v. Matlock, 415 U.S. 164, 177 n. 14, 94 S.Ct. 988, 996, 39 L.Ed.2d 242 (1974). The party giving consent must have “sufficient authority” over the property or premises to consent to the search, or at least the government officers making the search must have a reasonable belief that the person giving consent has that authority. See United States v. Diaz, 577 F.2d 821, 824 (2d Cir.1978) (where officers had reasonable, good faith belief that consent had been given, search did not violate Fourth Amendment); Mengarelli v. United States, 426 F.2d 985, 988 (9th Cir.1970), cert. denied, 400 U.S. 926, 91 S.Ct. 189, 27 L.Ed.2d 186 (1971) (search did not violate Fourth Amendment where officers reasonably believed that the individual had the authority to consent to the search).
The district court observed that plaintiffs contend that issues of fact exist as to whether cooperating witness # 3 (CW # 3), the person through whom the government gained access to the videotapes, is a person or several persons; what CW # 3’s agency relationship is to each of the movants and to Trans World News; and what his relationship is to the government, all of which require the Court to conduct an evidentiary hearing on the question of his consent to the search.
Memorandum Opinion at 8.
In dealing with this question, the district court stated that “this question is essentially one related to probable cause,” and since the magistrate had “sufficient facts before him [the affidavit and 50 video film descriptions] to conclude that the viewing of the *409videotapes had been conducted pursuant to the consent of CW # 3 properly given,” the magistrate could then determine probable cause. Id. We believe, however, that the question of voluntary and authorized consent is a separate issue from probable cause, and must be examined and decided apart from probable cause.
The government expunged considerable portions of the affidavit before furnishing it to plaintiffs. As to certain cooperating sources, the government struck out the identity or title of such persons “for reasons concerning personal and family safety,” indicating that these persons wished to remain anonymous. In the affidavit as furnished to plaintiffs, there are no details concerning the specific authority of the person or persons cooperating to give consent to the filming and display of the video tapes to which detailed descriptions of the contents were made. In its response to the plaintiffs’ motion, however, the government indicated that CW # 3 “was an employee of White” but “received training” at DI; was “an area supervisor” for DI in a city outside Ohio. The government indicated in this response that this cooperating employee of plaintiffs “personally” received “weekly shipments of videotapes from Cleveland” and put them in peep show booths “for reviewing by the general public ... at several book stores in his area.” The government then alleged that this cooperating person was “an agent for movants” White and DI, but the government wished to “conceal” his identity and location because of a “death threat” against “an informant” who was in the same city as CW #3.
The government’s response may have cured the deficiency inherent in the expunging of the important details of the affidavit which made it difficult initially for plaintiffs to address the question of consent. Through the government’s response, the plaintiffs were made aware that the informing witness was an area supervisor, who personally and regularly received the video tapes, and then placed them in the peep show booths in his assigned area. The district court concluded that “the searches were pursuant to a valid consent,” and that “movants have failed to show that an evidentiary hearing is necessary to the decision” because movants raised “only general allegations.” We find, however, that the information that the government provided the plaintiffs was insufficient and that a hearing under Rule 41(e) was warranted under the circumstances.
Rule 41(e) mandates that “the judge shall receive evidence on any issue of fact necessary to the decision.” Fed.R.Crim.P. 41(e) (emphasis added). This would infer that in the ordinary situation, the district court would hear evidence or testimony concerning the relevant issues involved. One of the important issues in this case is the question of the voluntary and authorized consent of one who would be in the posture of an alleged agent.
The district court cited United States v. Jones, 846 F.2d 358 (6th Cir.1988), in support of that rationale. Jones makes it clear that “no one single factor is determinative of voluntariness” of consent. 846 F.2d at 360. It adds that “careful consideration of all existing circumstances is necessary.” Id. Jones involved an evidentiary hearing, and the court held that the search involved in that case was involuntary and unconstitutional. Jones is hardly authority for the district court’s action in this case. In Mat-lock, also cited by the district court, there were “suppression hearings” based upon defendant’s motion. Movants here would have a difficult time, in view of the redacted and edited version of the warrant relied upon by the magistrate, to make specific allegations in contesting the question of consent of a person whose identity was unknown. As pointed out by the plaintiffs, moreover, the magistrate who authorized the search and seizure initially did not have before him the government’s response, which would have given him added information, when he made his decision. We believe that a Rule 41(e) evidentiary hearing was warranted on the question of whether the alleged agent had the authority to give consent to the officers or whether the officers reasonably believed that the alleged agent had the authority to give them consent to view the tapes in question.
*410EXTENT OF THE SEARCH
The government agents conducted a very extensive search of the plaintiffs’ premises. The plaintiffs question whether the massive array of documents, records, tapes, and related items were directly or sufficiently related to the fifty video tapes viewed and to the allegations contained in the warrant affidavit to support the search. Another serious question that plaintiffs raise is whether the seizure of the additional tapes involved in other shipments was authorized. Seizure of materials alleged to be obscene has been the subject matter of many Supreme Court decisions. Roaden v. Kentucky, 413 U.S. 496, 93 S.Ct. 2796, 37 L.Ed.2d 757 (1973), relying upon Marcus v. Search Warrant of Property, 367 U.S. 717, 724, 81 S.Ct. 1708, 1712, 6 L.Ed.2d 1127 (1961), indicated that an initial requirement for the seizure of a commercial film was that a magistrate have a prior opportunity to “focus searchingly on the question of [the film’s] obscenity.” Roaden, 413 U.S. at 506, 93 S.Ct. at 2802. Here, the magistrate had no such apparent opportunity to consider films not seen by him, nor described to him in some detail to the extent additional films were seized, beyond those described in the fifty descriptions attached to Larkin’s affidavit.
There is no question but that a broad ranging and pervasive scheme is alleged in the affidavit submitted to the magistrate and examined by the district court in this case. The government contends in its argument that this justified the broad sweep of the search warrant obtained.4 The government argues that it should not be limited to a “singular episode” of handling obscene products intended for interstate commerce because of money laundering and RICO5 averments set out in the affidavit and allegedly revealed in its investigation of plaintiffs’ activities.
We find that as to the fifty tapes to which there were detailed descriptions, there was probable cause to believe that these tapes were obscene and thus justified the warrant as to these particular tapes. United States v. Middleton, 599 F.2d 1349 (5th Cir.1979). Seizure of the records, receipts, notations, bills of lading, journals, ledgers, billing invoices, inventories, and other documents relating to these fifty films might be justified if proper consent were established for obtaining the films or tapes heretofore discussed under authority of Sovereign News Co.
The taking of notes and films from the office and the premises of plaintiffs, as was done by government agents in Sovereign News, would also be justified if valid consent and probable cause were indicated. See United States v. Espinoza, 641 F.2d 153, 162-64 (4th Cir.), cert. denied, 454 U.S. 841, 102 S.Ct. 153, 70 L.Ed.2d 125 (1981). A' second warrant and seizure might also be justified, as in Sovereign News, with respect to other items in “plain view” during the first search if such additional articles appeared to be obscene or involve directly related criminal activity. Whilé conclusions alone of an investigating officer or officers concerning the obscenity and the illegality of the kind involved in this case are not enough, the totality of the circumstances concerning contents of apparently-like products and films observed during the first search may furnish probable cause for a later warrant and search based on information obtained in the initial search. Stanford v. Texas, 379 U.S. 476, 485 n. 16, 85 S.Ct. 506, 512 n. 16, 13 L.Ed.2d 431 (1965); Sovereign News, 690 F.2d at 576. The warrant must not leave it to the discretion of the executing officers what is, or is not, to be seized.
This is both a Fourth Amendment and a First Amendment case. We do not consider, therefore, Andresen v. Maryland, 427 U.S. 463, 96 S.Ct. 2737, 49 L.Ed.2d 627 (1976), a case frequently cited in the government’s brief on the issue of the validity of the warrant and the search, to be *411relevant because Andresen deals with the Fifth Amendment.
Whether a warrant is too general or too broad, rather than limiting the search to particular documents and records, is a difficult area and depends upon the circumstances of the case. Compare the cases cited by the government on this question, although neither are obscenity cases, United States v. Spilotro, 800 F.2d 959 (9th Cir.1986) (a decision by Judge Kennedy holding the warrant too broad and general), with United States v. Wuagneux, 683 F.2d 1343 (11th Cir.1982), cert. denied, 464 U.S. 814, 104 S.Ct. 69, 78 L.Ed.2d 83 (1983).
In this respect, we hold that the district court was in error in not conducting a hearing to consider carefully the ramifications and circumstances involved in the issuance of the warrant. In remanding this case to the district court for a hearing, there remain issues as to whether the initial viewing of the fifty films or tapes (before they were described in detail) constituted an illegal search and seizure. See Walter v. United States, 447 U.S. 649, 100 S.Ct. 2395, 65 L.Ed.2d 410 (1980).
The general rule that contraband may be seized on a probable cause determination “is otherwise when materials presumptively protected by the First Amendment are involved.” Fort Wayne Books, Inc. v. Indiana, 489 U.S. 46, 109 S.Ct. 916, 927, 103 L.Ed.2d 34 (1989). “It is ‘[t]he risk of prior restraint, which is the underlying basis for the special Fourth Amendment protection accorded searches for and seizure of First Amendment materials’ that motivates this rule.” Fort Wayne Books, 109 S.Ct. at 928. Fort Wayne Books, decided shortly before the district court’s decision in this case, provides valuable analysis of the relationship between underlying obscenity violations and the broad RICO charges, albeit in a state law context. The Court stated:
At least where the RICO violation claimed is a pattern of racketeering that can be established only by rebutting the presumption that expressive materials are protected by the First Amendment, that presumption is not rebutted until the claimed justification for seizing books or other publications is properly established in an adversary proceeding.
Fort Wayne Books, 109 S.Ct. at 929 (footnote omitted).
Our remand to the district court, then, is supported by Fort Wayne Books, which indicates that an “adversary proceeding” is usually required in this type of situation.6 We recognize, at the same time, that what may be punishable under the obscenity laws "may form the basis of a racketeering conviction.” 109 S.Ct. at 930 (Justice Blackmun’s concurring opinion). We recognize also that there is no “higher” standard for probable cause for issuance of a warrant required in First Amendment cases such as this one. New York v. P.J. Video, Inc., 475 U.S. 868, 874, 106 S.Ct. 1610, 1614, 89 L.Ed.2d 871 (1986).7
We do not reach a decision on the government’s contention that in any event United States v. Leon, 468 U.S. 897, 104 S.Ct. 3405, 82 L.Ed.2d 677 (1984), would protect or vindicate the search made pursuant to the warrant, even if too broad and general in scope. We do express doubt that Leon would protect the search and seizure if it were determined that the warrant at the outset was deficient and failed to meet constitutional standards as contended by plaintiffs.
We REMAND this controversy to the district court for an adversary hearing under the circumstances and for consideration of the issues under the principles set out in this opinion. The district court, on remand, should consider also whether certain evidence may properly have been seized if *412probable cause were established, but the warrant itself may have been overbroad. See Worthington v. United States, 726 F.2d 1089 (6th Cir.), cert. denied, 469 U.S. 827, 105 S.Ct. 109, 83 L.Ed.2d 53 (1984).
The dissent in this case emphasizes the government’s important and legitimate interest in prosecution of, and the cessation of, racketeering and obscenity. While we understand this emphasis and do not fail to appreciate the government’s important concerns, we are also mindful of the potential constitutional issues raised by the plaintiff, and we seek a proper consideration and balancing of these competing interests in this case by remanding for a hearing. Nor should plaintiff be compelled, under the circumstances related, as the district court suggests, to await the ultimate outcome of seizures of master tapes which may involve unlawful prior restraints.
Our remand in this case does not require the district court again to review independently the written descriptions of the fifty films or tapes provided to the magistrate on the question of obscenity thereof. We note also that the magistrate's determination of probable cause is entitled to considerable deference. Illinois v. Gates, 462 U.S. 213, 236, 103 S.Ct. 2317, 2331, 76 L.Ed.2d 527 (1983).
We REVERSE and REMAND for an evi-dentiary hearing for the reasons indicated and for the purposes set forth herein.
. Each weekly set of tapes was called a "volume" or “library" with an assigned number corresponding to the week of the year. Each set of fifteen videos normally contained depictions of explicit and even deviant sexual activity. Each individual video bore a label identifying the volume, the date, and a short version of its title.
. In 1989 technical amendments were made to Rule 41(e). We do not deem them material to the issues discussed herein. See Fed.R.Crim.P. 41(e) (1990).
. Jurisdiction was found based on "inherent authority of the court over those who are its officers." Hunsucker, 497 F.2d at 32. Rapp approves this rationale by dictum.
. In somewhat comparable circumstances, without discussion as to the basis of jurisdiction, the Ninth Circuit recently assumed jurisdiction in Center Air Galleries-Hawaii, Inc. v. United States, 875 F.2d 747 (9th Cir.1989).
. The government’s brief puts it this way: "A broad criminal enterprise cannot avoid the scrutiny of a lawful search simply because of its magnitude.” Government’s Brief at 25.
. The RICO charges are based on an underlying predicate of dealing in obscenity.
. We should also note "[w]hile a single copy of a book or film may be seized and retained for evidentiary purposes based on a finding of probable cause, the publication may not be taken out of circulation completely until there has been a determination of obscenity after an evidentiary hearing.” 109 S.Ct. at 927.
. P.J. Video also holds that a magistrate is not required to view personally allegedly obscene films prior to issuing a warrant. See 475 U.S. at 874 n. 5, 106 S.Ct. at 1614 n. 5.