OPINION AND ORDER
On September 7, 1988, defendant Timothy L. Turner brought a motion to suppress material seized during a search of his residence alleging that the search warrant was executed without probable cause. Turner also argued that the warrant was not protected by the good faith exception to the exclusionary rule. The disposition of this motion was referred to United States Magistrate Jerome J. Niedermeier. In an opinion, dated November 9, 1988, Magistrate Niedermeier recommended that the court grant defendant’s motion to suppress. Pending before the court is the Government’s objection to Magistrate Niedermeier’s report and recommendation. For the *715 reasons which follow we now affirm Magistrate Niedermeier’s recommendation.
BACKGROUND
On January 23, 1984, Corporal Miner W. Tuttle of the Burlington Police Department applied for a search warrant to search defendant’s residence for evidence of a gambling operation. The application was prepared with the assistance of Chittenden County Deputy State’s Attorney John R. Churchill and was supported by Tuttle’s affidavit. The affidavit set forth information given to Tuttle by an informant.
Tuttle’s affidavit represents that the informant’s information “has been reliable and substantiated by independent investigation in the past....” Affidavit of Miner W. Tuttle at HA. However, Tuttle provides no further details concerning the informant’s reliability. The affidavit further provides that the informant has personal knowledge of gambling activities at defendant’s residence. Id. at IB. The informant described the procedure for placing bets over the telephone and provided Tuttle with defendant’s unlisted telephone number. Id. at II B-G. The informant stated that defendant determined betting odds by making daily telephone calls to Florida. Id. at 11 C. According to the informant, collections were delivered to defendant’s house on Tuesdays. Id. at IE. Tuttle’s informant also indicated that defendant maintained records of the gambling transactions which could be found in the house. Id. at IIH-I. Finally, the informant stated that he was “sure” bets were made on the Super Bowl which was played on January 23, 1984. 1 Id. at IJ. The only corroboration of the informant’s tip was that “Sgt. Ruggeiro [sic], Vermont State Police, told Affiant that the telephone number was Turner’s and that the telephone bill for last month was $1400.00.” Id. at IK. Although the affidavit states that the informant gave his tip to Tuttle on January 20, 1984, the affiant does not indicate when the informant observed defendant’s gambling operation.
Based on the application and affidavit, Vermont District Court Judge Edward Cashman found probable cause and issued the search warrant. The search was executed on January 23, 1984 and resulted in the seizure of drugs, money and gambling records. As a result of the search, defendant was indicted on July 28, 1988 for violation of 18 U.S.C. § 1084 and 26 U.S.C. § 7203.
Defendant made two arguments in his motion to suppress. First, defendant argued that probable cause was lacking because (i) the affidavit’s reference to the informant’s reliability consisted of a conclu-sory statement; (ii) the statements were not adequately corroborated by police investigation; and (iii) the informant’s information contained no reference as to when he observed the criminal activity. Second, defendant argued that the warrant was so lacking as to fail to meet the good faith exception to the exclusionary rule.
United States v. Leon,
DISCUSSION
Upon objection to a magistrate’s report and recommendation, the court must make a de novo review of those portions of the report to which objection is made and accept, reject, or modify, in whole or in part, the magistrate’s findings or recommendations. 28 U.S.C. § 636(b)(1)(C); Local Rule D(II), Rules for United States Magistrates, U.S. Dist. Court, D.Vt. Upon a de novo review of the record, we agree with the *716 magistrate that defendant’s motion to suppress should be granted.
1. Probable Came
A valid search warrant may only be issued upon an affidavit or complaint which sets forth facts establishing probable cause. U.S. Const, amend IV; Fed.R.Crim. P. 4(a). To demonstrate probable cause, an affidavit must set forth facts sufficient to induce a reasonably prudent person to believe that a search thereof will uncover evidence of a crime.
Berger v. New York,
[t]he task of the issuing magistrate is simply to make a practical, commonsense decision whether, given all the circumstances set forth in the affidavit before him, including the “veracity” and “basis of knowledge” of persons supplying hearsay information, there is a fair probability that contraband or evidence of a crime will be found in a particular place. And the duty of a reviewing court is simply to ensure that the magistrate had a “substantial basis for ... concludpng]” that probable cause existed. 2
Gates,
In the present case defendant has argued that the warrant was deficient in several respects: (i) the affidavit failed to substantiate the conclusion that the informant was reliable; (ii) the informant’s tip was not substantially corroborated by the police; and (iii) from the face of the affidavit the magistrate was unable to determine whether the information was stale. Each contention will be considered in turn.
The first asserted deficiency is that the affidavit fails to provide any basis for the conclusion that the informant’s information “has been reliable and substantiated by independent investigation in the past ...” Affidavit of Miner Tuttle at 11 A. Defendant argues that this declaration is similar to the affidavit in
Aguilar,
the magistrate must be informed of some of the underlying circumstances ... from which the officer concluded that the informant ... was “credible” or his information “reliable.” Otherwise, “the in *717 ferences from the facts which lead to the complaint” will be drawn not “by a neutral and detached magistrate,” as the Constitution requires, but instead, by a police officer “engaged in the often competitive enterprise of ferreting out crime.”
Aguilar,
However, the statement in the present case is not as conclusory as in
Aguilar.
Rather, the affiant declares that the informant has been “reliable and substantiated by independent investigation in the past.” Affidavit of Miner Tuttle at II A. This declaration is similar to the affidavit in
Jones v. United States,
The second deficiency asserted by the defendant concerns the corroboration of the informant’s tip. An informant’s reliability and accuracy may be strengthened by verification of particular aspects of the informant’s story.
Laws,
In the present case two of the informant’s facts were corroborated: the unlisted telephone number and the fact that defendant had a large telephone bill consistent with the long-distance use described by the informant. However, unlike Gates, neither fact is sufficiently detailed such that it raises the credibility of the informant’s tip.
In Gates, the police received an anonymous letter which stated that Sue and Lance Gates had $100,000 worth of drugs in the basement of their home in Illinois and gave a detailed description of their plan to purchase drugs in Florida. According to the letter, Sue would drive the car to Florida on May 3, Lance would fly to Florida a few days later, and Lance would drive the car back with $100,000 worth of drugs in the trunk.
Upon receipt of this tip, the local police made arrangements with an agent of the Drug Enforcement Agency for surveillance. That surveillance revealed that Lance Gates was booked on a plane to Florida on May 5. Gates was followed to Florida where he went to a room registered to Susan Gates. In the morning, the couple left the motel in a car which had Illinois license plates registered to them. They drove the car northbound on the interstate highway frequently used by travelers going to Illinois.
On the basis of the above corroboration, the police obtained a search warrant. According to the
Gates
Court, “[t]he judge, in deciding to issue the warrant, could have determined that the
modus operandi
of the Gateses had been substantially corroborated.”
Gates,
the anonymous letter contained a range of details relating not just to easily obtained facts and conditions existing at the time of the tip, but to future actions of third parties ordinarily not easily predicted. The letterwriter’s accurate information as to the travel plans of each of the Gateses was of a character likely obtained only from the Gateses themselves. ... If the informant had access to accurate information of this type a magistrate could properly conclude that it was not unlikely that he also had access to reliable information of the Gates-es’ alleged illegal activities.
Id.
at 245,
When compared to
Gates,
the facts in the present case do not support a finding of probable cause. Unlike
Gates,
the information gathered by the police was not suggestive of illegal activity. The use of an unlisted telephone number is a frequent practice in the modern era for any number of legitimate reasons. Furthermore, as defendant states in his memorandum, a large telephone bill “indicates nothing more than a penchant for long-distance phone calls and/or that a person conducts a business enterprise from his home, a common occurrence in modern times.” Moreover, there is no indication that the amount due in the
*719
bill was the result of one month’s service, or a carryover of past due amounts. While law-enforcement officers may use their expertise in translating activity that appears innocuous to the untrained mind into grounds establishing probable cause,
Laws,
In addition, the corroborated facts do not establish the credibility of the informant. In
Gates
the Court discussed
Draper v. United States,
Finally, the details given by the informant were not of the same quality as in Gates. In Gates, the details related not only to facts at the time of the tip, but also to future actions of third parties. Here, the only future event referred to was that “collection day was Tuesdays.” Affidavit of Miner Tuttle at 11E. However, this fact was not verified.
The third asserted deficiency is that the affidavit does not indicate when the informant made his observations. A finding of probable cause requires a determination that certain objects can currently be found at a particularly described place. 1 W. Ringel,
Searches & Seizures, Arrests and Confessions,
§ 4.2(a) at 4-13 (1988). “[I]f the information is too old, it is considered stale and probable cause no longer exists.”
United States v. Rakowski,
In the present case, the age of the tip could not be determined because the affi-ant neglected to indicate the date the informant observed the allegedly illegal activity. Without this information, the magistrate could not have determined whether the information was stale. As the court in
Rosencranz v. United States,
The government argues that while the date of the informant’s observation is absent, the freshness of the information can be inferred from an examination of the entire affidavit. More specifically, the government argues that the information was given to the affiant on January 20, 1984; however, in the affidavit the informant relates that the “Superbowl [sic] was just played on January 23,1984_” Affidavit of Miner Tuttle at ¶ J. Thus, the government contends that the information from the informant was supplemented between January 20, and January 23. While the government’s inference helps to determine the date of the “supplemented” information, it does not determine the date of the original observations. Moreover, the supplemented information only consisted of the informant’s statement that he was “sure” bets were taken on the Super Bowl, but the affiant does not provide a basis for the informant’s knowledge. In addition to the supplemented information, the government contends that the existence of the December telephone bill provides an inference as to the date of the information. However, as defendant points out, this information is at least one month old. More-“bver, this information was acquired through police corroboration and does not fix the date of the informant’s observations.
The government also contends that as the gambling operation was of an ongoing nature, the issue of staleness is less significant. Here, the information sought in the warrant was the records of defendant’s gambling activity. According to the court in
United States v. McGrath,
While the ongoing nature of defendant’s operation militates against a finding of staleness, the affidavit remains deficient because no starting point can be determined. Without such a reference point, the age of the information cannot be judged. The issuance of a warrant in this situation would allow “[officers with information of questionable recency [to] escape embarrassment by simply omitting averments as to time_”
Rosencranz,
The age of the information supporting a warrant is a factor that a magistrate should consider; however, if other factors indicate that the information is reliable then the magistrate should issue the warrant.
United States v. Batchelder,
Only two factors point to the reliability of the informant’s information. First, the
*721
affidavit indicates the informant’s personal knowledge of the gambling operation. The affidavit states that the informant knew the details of defendant’s gambling operation and allegedly heard several telephone conversations concerning the betting. According to 1 W. Ringel,
Searches & Seizures, Arrests and Confessions,
§ 4.3(a)(1) at 4-41 (1988), “when there is no independent corroboration of the information contained in the tip ... if knowledge is based on personal observation, it must be clear that the informant actually viewed the crime or the evidence of crime.” In the present case, however, the affidavit does not provide details of the informant’s knowledge which would substantiate his basis of knowledge. Rather, the affidavit’s display of the informant’s knowledge is limited to generalities. For example, the informant stated that the records of the gambling operation could be “found in the house.” Affidavit of Miner Tuttle at 11H. However, the informant does not provide the affiant with a specific location.
See United States v. Diecidue,
The second factor relating to the informant’s reliability concerns the affiant’s statement that he had given reliable information in the past. However, as in
Bruner,
2. Good Faith Exception
The government contends that even if the warrant was issued without probable cause, the search is valid under the “good faith” exception espoused in
United States v. Leon,
Defendant has countered the government’s reliance on
Leon
by arguing that the warrant in the present case was issued upon an affidavit so lacking in probable cause as to render official belief in its existence entirely unreasonable.
7
Upon re
*722
viewing the affidavit in the present case, we find that while this is a close question, we agree with defendant’s contention. The
Leon
Court’s good faith inquiry is “confined to the objectively ascertainable question whether a reasonably well trained officer would have known that the search was illegal despite the magistrate’s authorization.”
Id.
at 922 n. 23,
Although the affidavit evidences two attempts at corroborating the informant’s tip, the officer should have realized that this verification was insufficient. The corroboration consists of only two facts which fall short of identifying the
modus operan-di
of the gambling operation.
See Id.
at 226,
Finally, the officer should have known that the omission of the date of the informant’s observations made it impossible to determine the age of the information. Without such information the officer could not determine whether “the proof ... of facts [was] closely related to the time of the issue of the warrant....”
Sgro v. United States,
Despite this evident lack of probable cause, the government contends that the officer was in good faith because the officer obtained the approval of a deputy state’s attorney and the issuing judge. More specifically, the government contends that “the presentment of the warrant application to a deputy state’s attorney and the prosecutor’s review is evidence that the officer held an objectively reasonable belief in the validity of the warrant.”
Under
Leon,
the officer’s good faith inquiry follows an objective test.
Leon,
Initially we note that our focus here is not whether the judge merely approved the warrant application. Rather, our focus is whether the comments or acts of the judge caused the officer to objectively believe that the warrant was valid. If the officer’s good faith could be established by the mere fact that the judge approved the warrant application, then the
Leon
good faith exception would swallow the rule that an officer does not “manifest objective good faith in relying on a warrant based on an affidavit ‘so lacking in indicia of probable cause as to render official belief in its existence entirely unreasonable.’ ”
Leon,
According to the government’s proffer, prior to presenting the application for a search warrant to the issuing judge, Officer Tuttle asked Chittenden County State’s Attorney, Kevin Bradley, to review the affidavit. At that time, Bradley asked Tuttle whether there existed additional information which could bolster the credibility and reliability of the informant. Tuttle responded that while additional information existed, he was concerned that the inclusion of those facts might jeopardize another investigation being conducted by the Vermont State Police. 8 In response to this explanation, Bradley stated that the affidavit “had merit as it stood.” Before presentment to the issuing judge, the affidavit was also reviewed by Deputy State’s Attorney, John Churchill. According to the government, Churchill read the affidavit and informed Tuttle that it was satisfactory. The government makes no representation regarding any comments made by the issuing judge.
The government argues that as Bradley and Churchill told Tuttle that the affidavit was sufficient, Tuttle’s reliance on the warrant was objectively reasonable. In support of this argument, the government cites
United States v. Fama,
In
Sheppard,
a police officer presented an affidavit and warrant form to a judge. Although the affidavit established probable cause, the warrant form was defective in that it did not particularly describe the items to be seized. In applying the
Leon
test, the Supreme Court held that the officer was objectively reasonable in relying on the warrant because the issuing judge had made corrections to the warrant application and upon doing so informed the officer that the warrant was “sufficient authority in form and content to carry out the search requested.”
Id.
at 986 n. 3,
In the present case, however, there is no evidence that the issuing judge either corrected the warrant application or made *724 specific comments to Tuttle. Rather, the government’s proffer only indicates that “Tuttle did not receive any negative information concerning the warrant from Judge Cashman.” However, we do not believe that the issuing judge’s silence can be construed as establishing the officer’s good faith reliance on a plainly deficient warrant.
In
Fama,
the district court found that the warrant was so lacking in information that official belief in the existence of probable cause, even given the issuance of the warrant, would be wholly unreasonable.
Fama,
[bjefore applying for any warrants, Agent Garcia sought the expertise of an [Assistant United States Attorney] AUSA. The AUSA drafted the affidavit based on Agent Garcia’s information. Judge Cannella carefully reviewed the affidavit and found probable cause to arrest appellee.... The expertise of the AUSA, Judge Cannella’s findings and Judge Costantino’s issuance of the warrant were factors which supported an objectively reasonable belief in probable cause to search appellee’s home.
Id. at 837.
Unlike Fama, the affidavit in the present case was not prepared by the prosecutor. Rather, the affidavit was prepared by Tuttle. In addition, while the issuing judge in Fama “carefully reviewed the affidavit,” id. at 837, and “requested additional information on four of the named suspects,” id. at 835, there is no evidence in the present case that the issuing judge made such inquiries or “carefully reviewed the affidavit.”
Moreover, the Fama court indicated that the preparation of the affidavit by the AUSA and the judges’ review were “factors which supported an objectively reasonable belief in probable cause.” Id. at 837 (emphasis added). As any error as to the validity of the warrant was “attributable to the issuing judge,” id. at 838, the court held that the officer was in good faith. In this case, however, the affidavit contained insufficient evidence to establish probable cause. This error was at least partially attributable to Tuttle. When Tuttle sought the assistance of Bradley, he was asked whether more information was available to bolster the credibility and reliability of the informant. This inquiry put Tuttle on notice that Bradley had reservations regarding the sufficiency of the affidavit. Although Tuttle possessed additional information, he purposefully withheld this information to preserve the vitality of another ongoing investigation.
While the subsequent affirmation of the affidavit by Bradley and Churchill are “factors” to consider, we do not believe that they tip the scales in favor of a finding of objective reasonableness. Under
Leon,
the objective test “requires officers to have a reasonable knowledge of what the law prohibits.”
Leon,
Finally, we note that suppression in this case is in accordance with the deterrent function of the exclusionary rule. Ordinarily, where an officer relies in good faith on the magistrate’s probable cause determination, any error will be attributable to the magistrate. In such situations, “[penalizing the officer for the magistrate’s error, rather than his own, cannot logically con
*725
tribute to the deterrence of Fourth Amendment violations.”
Leon,
In the present case, it appears that Tuttle was aware of the fact that more information was needed to establish the credibility and the reliability of the informant. Although Tuttle possessed such information, he chose to withhold it in order to protect another ongoing investigation. While we approve of the officer’s desire to protect the individuals involved in the other investigation, we do not believe that the existence of the investigation should be used to penalize defendant. Rather, in such situations, more information may be required to establish probable cause. As stated previously, the affidavit in this case could have been bolstered by other corroborative techniques. These techniques were not overly burdensome. As such, we believe that suppression is in accordance with the deterrent function of the exclusionary rule.
CONCLUSION
In light of the foregoing, we find that the warrant was so lacking in probable cause as to fail to meet the good faith exception. Accordingly, defendant’s motion to suppress is GRANTED.
This case is scheduled for trial on Monday, May 8, 1989, at 9:30 a.m., before the Honorable Franklin S. Billings, Jr., Chief Judge.
Notes
. As Magistrate Niedermeier, a professional football aficionado, pointed out, the informant’s statement that the Super Bowl was played on January 23, 1984 was incorrect. In fact, the Super Bowl was played on January 22, 1984. United States v. Turner, No. 88-51, slip op. at 16, n. 2 (D.Vt. Nov. 9, 1988) (Magistrate’s Report and Recommendation) (citing Official Game Program, Super Bowl XXI, Denver Broncos v. New York Giants, at 67 (1987)).
. The government argues that Magistrate Nied-ermeier erred in conducting a
de novo
probable cause determination instead of deciding whether the issuing judge had a "substantial basis” for his probable cause determination. The government is correct in arguing that “the traditional standard for review of an issuing magistrate’s probable-cause determination has been that so long as the magistrate had a ‘substantial basis for ... conclud[ing]’ that a search would uncover evidence of wrongdoing, the Fourth Amendment requires no more."
Gates,
. Courts are not in complete agreement on this issue. According to 1 W. Ringel, Searches & Seizures, Arrests and Confessions, § 4.3(a)(1) at 4-38 (1988) (footnotes omitted):
[s]tatements that the informant’s information proved to be "reliable in the past” ... have been held by several courts to be sufficient recitations of veracity. Many courts, however, require a more detailed showing of the facts upon which this conclusion of past reliability is based, since the officer interested in obtaining a warrant may characterize as "reliable” an informant who has provided inaccurate information on more occasions than he has provided accurate information.
Despite this split of authority, we believe that more is needed to substantiate the reliability of the tip. We note that a more preferable approach would have been to include facts to substantiate the affiant’s statement that the informant was reliable in the past. For example, Tuttle’s statement would have been bolstered by a recitation of the informant’s "track record” in providing information leading to arrests or convictions,
United States v. Bagaric,
. The
Gates
Court noted that the corroboration consisted of innocent activity; however, this seemingly innocent activity became suspicious in light of the tip. Thus, ‘‘[i]n making a determination of probable cause the relevant inquiry is not whether particular conduct is 'innocent' or ‘guilty,’ but the degree of suspicion that attaches to particular types of noncriminal acts.”
Gates,
. The investigating officers could have done more to verify the informant’s tip. For instance, the informant stated that "collection day" was on Tuesdays. As the warrant was executed on a Monday, it would have been relatively easy for the officers to have postponed their warrant request for one day while establishing surveillance of the defendant’s home. The observation of individuals entering defendant’s home would have heightened the informant’s reliability because it would have shown his ability to predict the future acts of third parties.
Gates,
. The prosecution carries the burden of establishing the officer's good faith reliance on the warrant.
Leon,
. Defendant also argues that Leon is inapplicable because “[t]he judge ... acted as a rubber *722 stamp for the police and thus failed to perform his neutral and detached function as a judicial officer." However, Magistrate Niedermeier determined that there was no evidence that the actions of the judge caused him to shed his neutral role. United States v. Turner, No. 88-51, slip op. at 12 (D.Vt. Nov. 9, 1988) (Magistrate’s Report and Recommendation). As neither party objected to this issue, we need not review the finding. 28 U.S.C. § 636(b)(1)(C).
. Although this "additional" information bolstered Tuttle’s belief in the existence of probable cause, it is not relevant under Leon. According to the Leon Court:
[although we have suggested that "[o]n occasion the motive with which the officer conducts an illegal search may have some relevance in determining the propriety of applying the exclusionary rule," ... we believe that "sending state and federal courts on an expedition into the minds of police officers would produce a grave and fruitless misallocation of judicial resources.”
Leon,
