After executing a state search warrant for Robert Mykytiuk’s residence and truck, Wisconsin law enforcement officers found a handgun and equipment, materials, and chemicals used to manufacture methamphetamine. Later, federal prosecutors took over the case, and Mykytiuk moved to quash the search warrant and suppress the evidence. The district court denied the motion. Mykytiuk then entered a conditional guilty plea to one count of possessing pseudoephedrine with intent to manufacture methamphetamine, see 21 U.S.C. § 841(c)(2), and one count of possessing a firearm in furtherance of drug trafficking, see 21 U.S.C. § 924(c)(1)(A), reserving in his plea agreement the right to challenge the denial of his motion to suppress. The district court sentenced him to 90 months’ imprisonment on Count One and 60 months’ imprisonment on Count Two, to run consecutively. On appeal, Mykytiuk challenges the denial of his motion to suppress, arguing that the warrant was too broad and that the court erred in applying the good-faith doctrine. We conclude that the evidence was admissible under
United States v. Leon,
I
On May 2, 2003, Jason Hagen, a detective for the Barron County Sheriffs De *775 partment, served a search warrant at Tim Soltau’s residence and found chemicals and materials, including anhydrous ammonia, that led Hagen to believe that Soltau was manufacturing methamphetamine. After questioning, Soltau told two officers that he and Mykytiuk had stolen the anhydrous ammonia and stored it at Mykytiuk’s residence until three days earlier, when Soltau stole it for himself. Soltau also told the officers that Mykytiuk manufactured methamphetamine and ordinarily kept the necessary materials in two five-gallon buckets in vehicles parked at his residence. Soltau informed the officers that Mykytiuk ordinarily carries a loaded firearm in his vehicle, and that while at Mykytiuk’s residence, Soltau had fired fully automatic weapons belonging to Mykytiuk.
That day Hagen applied for a no-knock search warrant allowing officers to search Mykytiuk’s residence, vehicles, and outbuildings on the property. Ha-gen’s supporting affidavit detailed Sol-tau’s statements. In the affidavit, Hagen also represented that, “based on his experience and training,” he believed that a “person manufacturing methamphetamine would ordinarily possess methamphetamine and drug paraphernalia within his/ her residence.” Based on the affidavit, Barron County Circuit Judge James C. Babler issued a no-knock warrant to search “vehicles parked on the property of 2117 6}4 street, Cumberland, Wisconsin and a yellow two story house and outbuildings at that location ... [for] two five gallon buckets containing muriatic acid, paint thinner, pseudofed, lithium batteries, Coleman fuel, and/or coffee filters.” Upon executing the warrant, the officers found components of a methamphetamine lab in a storage building as well as additional materials used to manufacture methamphetamine and a Colt .45 semi-automatic handgun (found in Mykytiuk’s truck).
At that point, the investigation was referred to federal authorities. Mykytiuk was indicted for possessing pseudoephed-rine, possessing a firearm in furtherance of drug trafficking, possessing chemicals and equipment to manufacture a controlled substance, and attempting to manufacture methamphetamine. He moved to quash the search warrant and suppress the evidence on the grounds that the warrant was not supported by probable cause, that the warrant’s scope was too broad, and that no reasonable officer could have relied on the warrant in good faith. Magistrate Judge Stephen L. Crocker issued a report recommending that the motion be denied. Magistrate Judge Crocker reasoned that, although the warrant was not supported by probable cause, it was not overly broad and the officers had relied on it in good faith. Mykytiuk objected, but the district court adopted the report and recommendation and denied the motion to suppress.
II
On appeal, Mykytiuk again urges that the search warrant was not supported by probable cause, that it was overly broad, and that the good-faith exception to the exclusionary rule should not be applied to excuse the officers’ conduct in this case. The government concedes that the search warrant was not supported by probable cause. We nevertheless address this question briefly, both because the government’s concession is not ultimately binding on this court, and because the question whether probable cause was lacking is relevant to whether the officers relied on the warrant in good faith.
When, as here, an affidavit is the only evidence presented to a judge to support a search warrant, “the validity of the warrant rests solely on the strength of the affidavit.”
United States v. Peck,
317 F.3d
*776
754, 755-56 (7th Cir.2003). A search warrant affidavit establishes probable cause when, based on the totality of the circumstances, it “sets forth sufficient evidence to induce a reasonably prudent person to believe that a search will uncover evidence of a crime.”
Id.
(citing
Illinois v. Gates,
In
Koerth,
we had to decide whether statements from an informant of unknown reliability were sufficient to establish probable cause.
On Wednesday, Aug. 30, 2000, a search warrant was executed at 806 Ruff PL, Bloomer, Wis., which led to the seizure of marijuana, methamphetamine, and U.S. Currency. Investigation revealed that the marijuana and methamphetamine were purchased from a white male, known as Lonnie, who resides at 2344 195th Ave.
Abraham Savage, who is believed to be a reliable source, indicated that he was at Lonnie’s on Thursday, Aug. 29, 2000, and witnessed a large amount of marijuana. Savage stated he believed there was approximately 150-200 pounds of marijuana at the residence, as well as approximately two pounds of methamphetamine, a large bag of cocaine, and $30,000 in U.S. currency.
Savage has purchased from Lonnie in the past and that [sic] is a member of the Iron Wings Motorcycle Club.
Id. at 867. The officer also requested a no-knock warrant because the informant had seen “numerous firearms” at Lonnie’s residence. Id. We held in Koerth that despite the fact that the informant had first-hand knowledge of the allegedly illegal activity and gave “statements against his penal interest,” the facts were presented in a “conclusory and essentially uncorroborated fashion.” Id. at 870. The affidavit thus lacked a factual foundation, and was “based on the testimony of a previously unknown informant.” Id. at 867. We also noted that the informant had not appeared in person before the state judge who issued the search warrant and that the police had not corroborated any of his statements. Id. at 868. In those circumstances, to uphold the state judge’s probable cause determination “would be [imper-missibly] to ratify the search of a home based on the use of essentially conclusory statements without corroboration.” Id.
In the present case, Officer Hagan similarly failed to corroborate or provide foundation for Soltau’s statements. Although Soltau provided first-hand information against his penal interest, there was no evidence that he was a reliable witness or that he had provided accurate information in the past, and he provided only one detail to support the accuracy of his statements regarding Mykytiuk’s methamphetamine production — that Mykytiuk stored his materials in two five-gallon buckets. This was a thin reed on which to rest the probable cause determination, and we are *777 disinclined to second-guess both the district court’s and the government’s assessment of this point.
Even on the assumption that the warrant was bad and the search invalid, however, suppression of evidence is not the inevitable consequence. See
Leon, supra.
A facially valid search warrant issued by a neutral, detached magistrate will be upheld if the police relied on the warrant in good faith. See
Mykytiuk does not rely on either of the first two of those rebuttal theories. He argues only that this affidavit was so inadequate that a reasonable officer should have known that the warrant was no good. More specifically, Mykytiuk argues that the officers should have known that the warrant was invalid because this court’s case law — specifically the Koerth decision — makes clear that statements like those from Soltau are insufficient to establish probable cause. In response, the government argues that it would be unreasonable to assume that every police officer knows about a federal appellate court’s decision that appeared less than six months before the particular state search warrant was issued.
Police officers are charged with having knowledge of well-established legal principles. See
Koerth,
We think that the cautious approach advocated by Koerth is correct. On this record, we do not have the type of evidence that has been found so wanting in the past — uncorroborated, conclusory assertions from unproven informants — -that the availability of the good-faith exception has been forfeited. The officers had already found some of the ingredients necessary for manufacturing methamphetamine at Soltau’s residence, during the May 2 search. That alone provided corroboration for Soltau’s claim that he knew something about where the anhydrous ammonia found at his house had come from, and who else Soltau knew to be involved in the illegal activity. Furthermore, Soltau’s statements to the officers went beyond the conclusory allegations we have criticized in the past. He specified where Mykytiuk kept the ingredients for his meth operation, and what kind of weapons Mykytiuk had in his possession.
We do not mean to excuse the local officers’ apparent ignorance of
Koerth.
If
*778
a local drug task force routinely works with the federal government, it has a responsibility to learn and follow applicable legal precedent. The officers could consult with federal prosecutors before obtaining a warrant. See
United States v. Brown,
A measurable percentage of these task force cases (including some currently before the court) contain deficient police work. If the government wishes to continue to bring these cases federally, it should start screening them more carefully and/or start providing more training to state and county agents so that a de facto double standard doesn’t develop.
That said, we note that the scope of the good-faith exception to the warrant requirement may raise some federalism concerns. The state police officers were relying on the decision of the state judge to accept the affidavit, and it is a fact that the state trial courts are not bound directly by decisions of the federal courts of appeals. If, in a particular case, it could be shown that the conduct of the state courts and police complied with Fourth Amendment interpretations from the state supreme court and the U.S. Supreme Court, but was in apparent conflict with a decision of a federal court of appeals, we would need to decide what weight to give to the court of appeals’ decision. That is not this case, however, and we therefore save for another day further consideration of this problem.
The Supreme Court has concluded that “suppression of evidence obtained pursuant to a warrant should be ordered only on a case-by-case basis and only in those unusual cases in which exclusion will further the purposes of the exclusionary rule.”
Leon,
Both parties also briefed the issue whether the scope of the search warrant was overly broad because it authorized the search of Mykytiuk’s residence and outbuildings in addition to his vehicles. The only items found in Mykytiuk’s residence were two old rifles and a package of illegal M-98 Magnum explosive fireworks. Neither of these guns served as the basis for the § 924(c)(1) charge. If, as we have assumed, the warrant was unsupported by probable cause, its scope is irrelevant. Because we have found that the officers reasonably relied on the search warrant, it was also reasonable for them to conclude that they could search Mykytiuk’s residence. As Detective Hagan stated in his affidavit, it is reasonable to infer that a person who manufactures methamphetamine would keep drugs or materials in his house. A judge “is entitled to draw reasonable inferences about where evidence is likely to be kept, based on the nature of the evidence and the type of offense.”
United States v. Reddrick,
Ill
Shortly before oral argument in this case, we permitted Mykytiuk to file a supplemental brief in which he claimed that he was entitled to be resentenced under the principles announced in
Blakely v. Washington,
— U.S. -,
We conclude that Mykytiuk’s objection was not enough to allow him to escape the plain error standard of review for his
Blakely/Booker
argument. In keeping with the procedure outlined in
United States v. Paladino,
“[T]he District court should obtain the views of counsel, at least in writing, but need not require the presence of the Defendant, see Fed.R.Crim.P. 43(b)(3). Upon reaching its decision (with or without a hearing) whether to resentence, the District Court should either place on the record a decision not to resentence, with an appropriate explanation,” or inform this court of its desire to resen-tence the defendant. (By “should” in the quoted passage we understand “must.”)
Paladino,
IV
We Affirm the district court’s order denying Mykytiuk’s motion to suppress. While retaining jurisdiction over the appeal, we Remand for the limited purpose of learning the district judge’s decision on the question of resentencing.
