The defendants (appellees) stand jointly charged in a four count indictment returned on March 22, 1972, with possessing four firearms which were transported in and affected interstate commerce in violation of Tit. 18 App. U.S.C. § 1202(a)(1).1 On April 14, 1972, the defendants filed a joint motion to suppress the firearms described in the indictment on the grounds, inter alia, that the weapons were obtained as the result of an illegal search and seizure in violation of the Fourth Amendment to the United States Constitution and because the information presented to the magistrate who issued the search warrant did not sufficiently delineate the “informant’s” source of knowledge as required by Spinelli v. United States, 393 U.S. 410, 89 S.Ct. 584, 21 L.Ed.2d 637 (1969). The district court entered an order suppressing the firearms and this appeal followed.
I. BACKGROUND
The application for the search warrant was made on October 20, 1971, in the Municipal Court of Sioux City, Iowa, by Francis O’Keefe, Captain of Detectives of the Sioux City police force. The application was supported by O’Keefe’s affidavit, which is reprinted in full in the margin,2 and his oral testimony given under oath before the issu*811ing magistrate.3 His live testimony contained the supplementing information that he had been told by three separate police officers that each had received informer tips identical to that recited in the affidavit; that FBI Special Agent Oxler and Sioux City Lieutenant Larson had received tips from the same informant ; and that one Sergeant Stewart of the Sioux City police had received the identical tip from another informant. O’Keefe further testified that he had twice interviewed the informant mentioned by Oxler and Larson to verify the contents of the tip, particularly questioning him about the location of the guns.
After presenting the affidavit and supporting testimony to the magistrate, O’Keefe revealed to him the name of Ox-ler and Larson’s informer. Since the judge recognized this informer as a person who had previously supplied reliable information upon which the judge had acted and which proved correct, he relied upon that informant’s tip and made no effort to ascertain the credibility of Stewart’s informer.
Based upon the officer’s written affidavit and his supplementing sworn testimony, the warrant was issued by the magistrate, and executed by police officers who found, in the apartment described in the affidavit and specified in the warrant, the four guns which are the subject of the indictment.
The district court, in sustaining the motion to suppress, reasoned that the Supreme Court had laid down a “2-prong rule” in Aguilar v. Texas, 378 U. S. 108, 84 S.Ct. 1509, 12 L.Ed.2d 723 (1964), and Spinelli, supra, to wit: the affidavit for the warrant must disclose (1) circumstances justifying the magistrate to conclude the informant was credible, and (2) circumstances supporting the informant’s conclusion of the defendants’ connection with the criminal activity. The court found the first prong — the credibility of the informant —had been sufficiently satisfied, and. that finding is not challenged here by appellees. But the court found the second prong unsatisfied. In so deciding, the court reasoned:
“The affidavit in the case before this court like that in Spinelli does not state any of the underlying circumstances on which the informant concluded that defendants had committed the burglary in which the firearms were taken. There is nothing in this record independent of the informant’s conclusions suggesting any criminal activity on the part of defendants. Thus, compliance with the second prong of Aguilar-Spinelli is lacking.
It is therefore the view of the court that since the affidavit of Captain O’Keefe fails to state how this informant came by his information connecting the defendants with the burglary it was insufficient to establish probable cause for the issuance of the search warrant and the evidence must be suppressed.”
Thus, because Aguilar’s second prong was not satisfied, the district court granted the suppression order. The government then sought reconsideration of the order, contesting for the first time the standing of defendants to challenge the search and seizure. This issue was rejected by the court and this appeal followed.
II. STANDING ISSUE
The government’s contention that defendants lack standing to contest this search is premised on evidence which tends to show that defendants had no interest, possessory or otherwise, in the apartment where the guns were seized. However, regardless of the merits of the argument espoused by the government, *812we prefer to and do assume arguendo that the defendants possessed the requisite standing and go directly to the issue of the validity of the search warrant.
III. THE VALIDITY OF THE SEARCH
The essential question presented by defendants’ objections to this search is whether there was probable cause for the issuance of the warrant pursuant to which the search was conducted. Since without the informer’s tip the officers’ information would have consisted solely of knowledge of the occurrence of the burglary and observation of the act of removing a heavy, cardboard box from a car into a vacant apartment, it is clear the reliability of the informer’s tip is essential to the validity of the warrant. Henry v. United States, 361 U.S. 98, 80 S.Ct. 168, 4 L.Ed.2d 134 (1959). In this case, as in most similar cases, the magistrate could easily have found that the affiant officer accurately repeated the informer’s tip and that the tip, if true, furnished probable cause for issuance of a warrant. The focal problem in these cases, then, is whether the magistrate was given sufficient basis for crediting the informer’s tip. This is a problem which has received considerable attention from the courts, notably the Supreme Court,4 to whose opinions we now turn.
A.
The convenient starting place in discussing Supreme Court caselaw on informers’ tips is Draper v. United States, 358 U.S. 307, 79 S.Ct. 329, 3 L.Ed.2d 327 (1959). In that case the information the Supreme Court deemed sufficient to credit the tip was twofold. First, the officers swore to the informer’s past reliability in furnishing information. Second, the reliability of the contents of this particular tip was shown by the fact the police independently corroborated every facet of the tip’s detailed description of the suspect and his activities except the essential fact that he had heroin in his possession. Then, in Aguilar v. Texas, 378 U.S. 108, 84 S.Ct. 1509, 12 L.Ed.2d 723 (1964), the Supreme Court laid down a standard for testing the credibility of informers’ tips which took no cognizance of the Draper holding that corroboration of part of the tip infers the remainder is reliable. Instead, the Court held that the magistrate must be told not only “some of the underlying circumstances from which the officer concluded that the informant . was ‘credible’ or his information ‘reliable’ ” but also “some of the underlying circumstances from which the informant” reached the conclusions conveyed in his tip. 378 U.S. at 114, 84 S.Ct. at 1514.
The Court soon made clear, however, that the prophylactic rule announced in Aguilar did not overrule Draper sub silentio. In Spinelli v. United States, 393 U.S. 410, 89 S.Ct. 584, 21 L.Ed.2d 637 (1969), the Court expressly reaffirmed Draper and enunciated the following alternative test:
“The informer’s report must first be measured against Aguilar’s standards so that its probative value can be assessed. If the tip is found inadequate under Aguilar, the other allegations which corroborate the information contained in the hearsay report should then be considered. At this *813stage as well, however, the standards enunciated in Aguilar must inform the magistrate’s decision. He must ask: Can it fairly be said that the tip, even when certain parts of it have been corroborated by independent sources, is as trustworthy as a tip which would pass Aguilar’s tests without independent corroboration ? Aguilar is relevant at this stage of the inquiry as well because the tests it establishes were designed to implement the long-standing principle that probable cause must be determined by a ‘neutral and detached magistrate,’ and not by ‘the officer engaged in the often competitive enterprise of ferreting out crime.’ Johnson v. United States, 333 U.S. 10, 14 [68 S.Ct. 367, 92 L.Ed. 436] (1948). A magistrate cannot be said to have properly discharged his constitutional duty if he relies on an informer’s tip which— even when partially corroborated — -is not as reliable as one which passes Aguilar’s requirements when standing alone.
. In the absence of a statement detailing the manner in which the information was gathered, it is especially important that the tip describe the accused’s criminal activity in sufficient detail that the magistrate may know that he is relying on something more substantial than a casual rumor circulating in the underworld or an accusation based merely on an individual’s general reputation.
The detail provided by the informant in Draper v. United States, 358 U.S. 307 [79 S.Ct. 329, 3 L.Ed.2d 327] (1959), provides a suitable benchmark. While Hereford, the Government’s informer in that case, did not state the way in which he had obtained his information, he reported that Draper had gone to Chicago the day before by train and that he would return to Denver by train with three ounces of heroin on one of two specified mornings. Moreover, Hereford went on to describe, with minute particularity, the clothes that Draper would be wearing upon his arrival át the Denver station. A magistrate, when confronted with such detail, could reasonably infer that the informant had gained his information in a reliable way.”
393 U.S.. at 415-417, 89 S.Ct. at 588, 589. Spinelli thus stands squarely for the proposition that even if the two-pronged test of Aguilar is not met, the information before the magistrate may be sufficient if, as in Draper, it is sufficiently detailed, or sufficiently corroborated, to supply as much trustworthiness as does the Aguilar test. See Judge (now Mr. Justice) Blackmun’s opinion in United States v. Mitchell, 425 F.2d 1353 (8th Cir.), cert. denied, 400 U.S. 853, 91 S.Ct. 85, 27 L.Ed.2d 90 (1970).
The Supreme Court caselaw on this subject has its most recent pronouncement in United States v. Harris, 403 U. S. 573, 91 S.Ct. 2075, 29 L.Ed.2d 723 (1971). While we think the present case can be decided solely on Spinelli’s reaffirmation of Draper, the Harris case merits attention because the Supreme Court majority in that case, while unable to agree to an opinion, was able to agree to a judgment which indicates a measure of disagreement with the result in Spinelli. See especially Mr. Justice Blackmun’s concurring opinion, 403 U.S. 585, 91 S.Ct. 2075.5
In Harris, there was no averment of underlying circumstances to support the informer’s credibility and thus the first of Aguilar’s two prongs was not satis*814fied. Furthermore, unlike Draper, none of the tip was corroborated by independent investigation. The corroboration consisted solely of the suspect’s past record and reputation'and other unspecified tips from undisclosed informants. The Court nevertheless affirmed the validity of the warrant, primarily because, according to the Chief Justice’s plurality opinion, the underlying circumstances by which the informer acquired his information were said by the informer to be firsthand observation and activity, and because the credibility of this claim of firsthand knowledge was bolstered both by the fact it constituted an admission against penal interest and because the substance of the claim was corroborated to the extent mentioned above.
Thus Harris, it seems to us, indicates the inclination of the present Supreme Court to relax the standards by which the credibility of informers’ tips are to be judged and to avoid the mechanical application of prophylactic rules such as the Aguilar test. Yet, we need not rely in this case upon prognostication of future cases. The alternative test enunciated in Spinelli is clearly satisfied here.6 It does seem to us, however, that in view of the concurring opinions of Mr. Justice White in Spinelli and Mr. Justice Blackmun in Harris, in view of the marked difference in tone between Harris and Spinelli, and in view of the split voting pattern in those two cases, the lower federal courts would be well served if the Supreme Court would clarify its views as to warrants and searches premised upon informers’ tips.
B.
In applying Spinelli’s alternative test to the facts of the present case, we first apply the Aguilar test — the sufficiency of the showing furnished the magistrate of (1) the underlying circumstances showing the credibility of the informer or the reliability of his information, and (2) the underlying circumstances from which the informer reached the conclusions he conveyed in the tip, which here were his statements that these defendants were the burglars and used the specifically described car in the burglary. Here, of course, as found by the district court, Aguilar’s first prong is amply satisfied. The magistrate himself recalled that the informer, whose name was revealed to him, had furnished reliable information on which the magistrate had acted in *815the past. However, the second prong of Aguilar is not satisfied because Captain O’Keefe revealed nothing to the issuing judge that would indicate the basis of the informer’s conclusions. We turn then to the alternative to the Aguilar test, Draper: whether the informer’s tip was sufficiently detailed and corroborated to indicate its probable reliability. We think that test is clearly satisfied here.
First, unlike most other informer tip cases, the officers here were investigating a known crime, not a crime whose existence was evidenced only by the informer’s tip. Compare Harris, Spinelli, McCray, Beck, Aguilar, Jones, and Draper, supra note 4, with Rugendorf v. United States, supra note 4. Second, the officers observed the three suspects named by the informer driving a car which belonged to someone else and which was identical in year, make, model, color and license number to the ear said by the informer to have been used by them in the burglary. Third, the officers observed the three suspects unload from that car a very heavy, five foot long cardboard box, which could well contain some of the stolen guns, and deposit the box in an apartment which was not only vacant but also in a building under the control of the owner of the car. Fourth, as in Harris and Jones, supra, this informer tip was further corroborated by the fact it was identical to a tip given another officer by another informer, see 403 U.S. at 581, 91 S.Ct. 2075; 362 U.S. at 271, 80 S.Ct. 725, and by the fact this informer of known reliability conveyed this tip separately to an FBI agent and a city police lieutenant and repeated it twice under questioning by Captain O’Keefe.
In sum, we think the credibility of the informer, which was proven by the magistrate’s personal knowledge of his past reliability, plus the specificity and extent of the corroboration of the information supplied by the informer, were sufficient to support the magistrate’s belief the identified informant’s information was true. That information being credited, there clearly was probable cause for issuing the warrant and the search was therefore constitutionally valid. The District Court’s order suppressing the evidence is therefore vacated and the cause remanded for further proceedings not inconsistent with this opinion.
. Each count charges possession on October 20, 1971, of a different firearm, and also alleges all of the defendants have previously been convicted of a felony.
. The body of Captain O’Keefe’s affidavit recited as follows:
I, FRANK O’KEEFE, being first duly sworn on oath state as follows:
THAT I am a Captain in Charge of the Detective Bureau, Sioux City Iowa Police Department.
THAT on 10-16-71 between 7:30 P.M. and 8:45 P.M. the home of GEORGE A. LORENGER, 1000 South Camelia was burglarized. Taken in this burglary were thirty-three (33) firearms consisting of hand guns, shotguns, and rifles.
I received information from a reliable confidential informant who stated that the following men were involved in this burglary: JAMES MARIHART, ED-
WIN W. KINSLEY, AND MICHAEL GEREAU. At the time of this burglary, these men were driving a 1962 Blue Ford Station Wagon, 1971 Plates Iowa 47-4556. At the time, this car was registered to RAY MAGNUSON. This car was used in the commission of this crime.
THAT since that time I received the following information from DAVE OX-LER, SPECIAL AGENT FBI who stated that between 11:00 A.M. and 11:30 A.M. Wednesday, 10-20-71, that he had occasion to be in the area of the 1800 Block Jackson. That while at this location, he saw the blue 1962 Ford Station Wagon License Number 47-4556 stop in front of 1807 Jackson. That there were three men in this vehicle believed to be the men named in this affidavit and who perpetrated this crime. That these men unloaded a large pasteboard box approximately five feet in length, and it appeared to have tape around it. This blox [sic] is believed to contain some of the firearms which were stolen from the residence of GEORGE LORENGER on 10-16-71. MR. OXLER stated that these three men had difficulty carrying this box into the residence at 1807 Jackson. He stated they entered the north door of this multiple dwelling. Further investigation revealed that this door leads to Apartment No. 2, and this apartment is vacant.
We have reason to believe that these weapons are now concealed in this vacant apartment. A check with MARVIN DICUS, Apartment No. 6, 1807 Nebraska revealed that this multiple dwelling is under the custody and control of RAY MAGNUSON.
THAT DAVE OXLER is familiar with the vehicle and persons named herein, concerning investigations being made by the FBI.
(s) Frank O’Keefe
CAPTAIN FRANK O’KEEFE COMMANDING OFFICER DETECTIVE BUREAU
. At a suppression hearing in state court relating to this same warrant Captain O’Keefe testified in detail as to the contents of his oral testimony to the magistrate who issued the warrant. The transcript of this testimony was placed in evidence on the motion to suppress here at issue.
. See United States v. Harris, 403 U.S. 573, 91 S.Ct. 2075, 29 L.Ed.2d 723 (1971) ; Whiteley v. Warden, 401 U.S. 560, 91 S.Ct. 1031, 28 L.Ed.2d 306 (1971) ; Spinelli v. United States, 393 U.S. 410, 89 S.Ct. 584, 21 L.Ed.2d 637 (1969) ; McCray v. Illinois, 386 U.S. 300, 301-305, 87 S.Ct. 1056, 18 L.Ed.2d 62 (1967) ; Beck v. Ohio, 379 U.S. 89, 85 S.Ct. 223, 13 L.Ed.2d 142 (1964) ; Aguilar v. Texas, 378 U.S. 108, 84 S.Ct. 1509, 12 L.Ed.2d 723 (1964) ; Rugendorf v. United States, 376 U.S. 528, 84 S.Ct. 825, 11 L.Ed.2d 887 (1964) ; Jones v. United States, 362 U.S. 257, 267-273, 80 S.Ct. 725, 4 L.Ed.2d 697 (1960) ; Draper v. United States, 358 U.S. 307, 79 S.Ct. 329, 3 L.Ed.2d 327 (1959) ; Henry v. United States, 361 U.S. 98, 80 S.Ct. 168, 4 L.Ed.2d 134 (1959).
. A number of the judges composing this court’s present majority were, like Mr. Justice Blackmun, members of the en banc majority reversed by the Supreme Court in Spinelli, see 382 F.2d 871 (8th Cir. 1967), and many of us agree with his statement that “Nothing this [the Supreme] Court said in Spinelli convinced me to the contrary.” 403 U.S. at 586, 91 S.Ct. at 2083. However, we will of course continue diligently to apply the law as announced in Spinelli so long as the Court adheres to it. Indeed, no relaxation of the Spinelli standards is needed to approve the present warrant.
. Contrary to the averment in the dissenting opinion, the majority does not decide this case as it has “because it senses ‘an inclination of the present Supreme Court to relax the standards by which the credibility of informer tips are to be judged.’ ” Nor do we think, as the dissent asserts, that our opinion “discards the second prong of the Aguilar test” or “suggests that Harris v. United States has destroyed the underpinnings of” Aguilar’s second prong. As we stated in the text above before the dissent was penned, we do think Harris indicates the present Supreme Court’s discomfort with Spinelli’s result, but we need not rely upon that view to decide the case as we have. It was the Spinelli opinion itself which authorized substituting the Draper test for Aguilar’s second prong; thus the present majority opinion has faithfully complied with Spinelli in relying upon Draper instead of Aguilar. As the dissenting opinion ultimately reveals, the real difference between the majority and dissenters in this case is not over the law as stated in Aguilar and Spinelli, but the conclusion one reaches after applying Draper to the facts of this ease. The dissent says that “Draper relaxes [Aguilar’s second prong] . . . only where the informant describes in sufficient detail future activities which subsequently occur.” As demonstrated in Part III B of this opinion, we do not believe Draper is limited to the degree of detail of tips of future activity. The question is the reliability of the method by which the informer acquired his information, not his talents as a prognosticator. Thus a combination of detail and corroboration of past and future incriminating conduct will suffice. The only reason it was important in Draper that the tip predicted future conduct was because the tip concerned a crime which had not yet occurred. Where, as here, the crime precedes the tip, we think it misreads Spinelli and Draper to say the tip is accurate only if it predicts additional future conduct by the suspected parties.