OPINION
¶ 1 The question presented is whether a resident’s consent to search her home is invalid because it was preceded by an allegedly illegal search of which the resident was unaware. We hold that the consent to search is valid under the circumstances.
I
¶ 2 In March 2006, police received information that Jose Guillen was storing marijuana in his garage; no investigation took place at that time. Eight months later, after confirming that the house was unoccupied, police called a narcotics officer with a drug-sniffing dog to the scene. The home was not enclosed by a fence and no signs prohibited public access to the front of the house. The garage was attached to the house and accessible by a driveway. The narcotics officer and the dog walked up the driveway to the garage door. After sniffing the door’s bottom seam, the dog began barking and scratching, indicating that he had detected the odor of marijuana.
¶ 3 One to two hours later, Guillen’s wife returned home. Officers approached her in the driveway and asked if they could continue talking inside. She agreed. Without mentioning the dog sniff, the officers told her that they had information that marijuana was being stored at the house and asked for permission to search it. Mrs. Guillen granted permission and led the officers to the garage, where they detected a “strong odor of marijuana.” The narcotics officer then brought the dog into the garage and the dog signaled at an unlocked freezer that he detected the odor of marijuana. Mrs. Guillen permitted the officers to open that freezer, which was empty but smelled of marijuana. After obtaining a telephonic search warrant, the officers searched two locked freezers and found bales of marijuana.
¶ 4 Before trial, Guillen moved to suppress evidence discovered in his garage and his subsequent statements to the police, arguing that the dog sniff violated his rights under the Fourth Amendment of the United States Constitution and Article 2, Section 8 of the *316 Arizona Constitution. The superior court denied Guillen’s motion, concluding that whether the dog sniff was an illegal search was irrelevant because Mrs. Guillen voluntarily consented to the search.
¶ 5 A jury subsequently convicted Guillen of possession of marijuana for sale and drug paraphernalia, and the trial court sentenced him to prison.
II
¶ 6 A divided panel of the court of appeals reversed and remanded.
State v. Guillen,
¶ 7 Turning to the issue of Mrs. Guillen’s consent, the court of appeals stated that if the trial court on remand found that the officers did not have reasonable suspicion, it then would have to “determine whether the officers used the information acquired to trigger the next step in their investigation— asking for consent to search the house — or whether ... they would have taken that step regardless of the outcome of the dog sniff.”
Id.
at 91 ¶ 32,
¶ 8 Dissenting, Judge Espinosa was “unconvinced [that] the trial court erred in concluding Mrs. Guillen’s consent obviated the need to discuss the constitutionality of the dog sniff[,]”
id.
at 92 n. 13 ¶ 34,
¶ 9 The State petitioned for review, arguing that the court of appeals erred in interpreting the state constitution and, in any event, Mrs. Guillen’s voluntary consent obviated the need to reach the state constitutional question. Because this case involves a matter of first impression, we granted review. We have jurisdiction under Article 6, Section 5(3) of the Arizona Constitution and Arizona Revised Statutes § 13-4032 (2001).
Ill
A
¶ 10 The Fourth Amendment provides in part that “[t]he right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated.” Unlawful entry into a home is the “chief evil” against which the provision protects.
See, e.g., Welsh v. Wisconsin,
¶ 11 One long recognized exception to the warrant requirement is consent.
Davolt,
¶ 12 Here, defense counsel made clear at the suppression hearing below that Guillen was not challenging the voluntariness of Mrs. Guillen’s consent or her authority to consent to the search.
See, e.g., United States v. Matlock,
B
¶ 13 Evidence seized following consent to a search must be suppressed if the consent is tainted by a prior constitutional violation.
Brown v. Illinois,
¶ 14 In
Brown,
the Supreme Court set forth a test to determine whether the taint of the illegal conduct is sufficiently attenuated from evidence subsequently obtained by voluntary consent.
*318 C
¶ 15 Assuming, without deciding, that the dog sniff violated Article 2, Section 8, we conclude that Mrs. Guillen’s consent was valid because under Brown’s three-factor test, intervening circumstances obviated any alleged taint and the first dog sniff conducted from outside the garage was not flagrant police misconduct.
¶ 16 Mrs. Guillen’s consent was obtained within a few hours after the dog sniff took place. Although this fact favors Guillen,
see Delgadillo-Velasquez,
¶ 17 Mrs. Guillen’s lack of knowledge of the dog sniff constitutes a major break in the causal chain.
See, e.g., United States v. Furrow,
¶ 18 It is uncontested that Mrs. Guillen was unaware of the dog sniff when she consented to the search.
3
Because Mrs. Guillen knew nothing of the dog sniff, no link between the alleged illegality and the consent was established.
Furrow,
¶ 19 Regarding
Brown’s
final factor, flagrancy of the alleged violation, nothing suggests that the officers knowingly violated Guillen’s rights by conducting the first dog sniff from outside his garage. First, none of the traditional markers of privacy appeared: no wall or fence obstructed entry onto Guillen’s property, and no signs alerted the officers that such entry was prohibited. The front entrance and garage were publicly accessible.
See United States v. Velazco-Durazo,
¶ 20 Second, the case law on dog sniffs of the exterior of a residence accessible to the public is far from clear. Dog sniffs of cars and luggage or other containers in public places plainly do not constitute searches under the Fourth Amendment.
See Caballes,
¶21 Notwithstanding these cases, neither this Court nor the United States Supreme Court has analyzed the constitutionality of dog sniffs conducted at the exterior of a residence under the Fourth Amendment or the Arizona Constitution. Moreover, cases from other jurisdictions are split on whether dog sniffs of the exterior of a residence violate the Fourth Amendment or their respective state constitutions.
Compare Hoop v. State,
D
¶ 22 Mrs. Guillen’s consent was sufficiently attenuated from any alleged prior illegality. Accordingly, the court of appeals erred in ordering a remand for the trial court to determine whether the officers’ request for her consent was based in part on the positive dog sniff.
Guillen,
IV
¶ 23 For the foregoing reasons, we vacate the opinion of the court of appeals and affirm Guillen’s conviction.
Notes
. This Court has held that for purposes of the Arizona Constitution, the "exclusionary rule to be applied as a matter of state law is no broader than the federal rule.”
Bolt,
. In analyzing whether a confession was obtained by exploitation of an illegal arrest, the Court in
Brown
also considered whether the police gave
Miranda
warnings to be "an important factor."
. At the suppression hearing, the State offered to admit a recording of the conversation between the officers and Mrs. Guillen. Defense counsel said that the court need not listen to the recording because he was not challenging the voluntariness of her consent.
