T1 Pearl Topanotes ("'Topanotes"), petitioner, seeks certiorari review of a court of appeals' decision wherein the trial court's denial of her motion to suppress evidence obtained after an unlawful detention was reversed and the case remanded for further proceedings. The remand order allowed new evidence on the issue of inevitаble discovery, which was raised by the State as an alternative ground for affirmance for the first time on appeal. The State cross-petitions, arguing that remand is unnecessary because inevitable discovery is sustained by the record in this case. We vacate and remand for proceedings consistent with this opinion.
FACTUAL AND PROCEDURAL HISTORY
1 2 On October 7, 1998, two Salt Lake City police officers, Sergeаnt Kenneth Hansen and Officer Todd Mitchell, were visiting the home of a recently arrested prostitute in an attempt to confirm her actual residence. While they were there, the officers saw To-panotes walking toward the trailer. Since Topanotes fit the description of someone who allegedly lived in the home, the officers stopped her and asked for identification. At that moment, the officers did not have an articulable suspicion that Topanotes had or was about to commit a erime, or probable cause sufficient for an arrest. Topanotes gave Sergeant Hansen her identification, and Sergeant Hansen handed it directly to Officer Mitchell to perform a warrants check as part of "routine procedure" оr "common practice." Officer Mitchell retained possession of Topanotes' identification during the warrants check.
183 While waiting for the results of the warrants check, Sergeant Hansen attempted to confirm with Topanotes the actual residence of the prostitute they had just arrested. Sergeant Hansen later testified that if Topanotes had refused to talk to him, he would have ended the encounter. The warrants check was completed within five minutes and revealed two outstanding warrants for Topanotes, who was immediately arrested. The officers discovered heroin on her person during the search incident to her arrest, and subsequently charged Topanotes with unlawful possession of a controlled substance, a third degree felony.
T4 At trial, Topanotes moved to suppress the heroin on the basis that the substance was the fruit of an unlawful level-two detention. The trial court held two evidentiary hearings on the matter and ultimately denied the motion to suppress, ruling that the officers were engaged at all times in a consensual level-one investigatory encounter with To-panotes. After the denial of her motion tо suppress, Topanotes entered a conditional *1161 guilty plea, reserving her right to appeal the trial court's ruling.
T5 While the appeal was pending, the Utah Court of Appeals held in a separate case that retaining an individual's identification while conducting a warrants check, in the absence of an articulable suspicion or probable cause, is an unlawful lеvel-two detention. Salt Lake City v. Ray,
T6 In light of Ray, the State in this case conceded on appeal that the trial court erred in its ruling. Instead, the State argued for the first time a new, alternative ground for affirmance: that the heroin was admissible under the inevitable discovery exeeption to the exclusionary rule. The court of appeals reversed the trial court's ruling and remandеd for additional factual findings on the issue of inevitable discovery.
I 7 We granted Topanotes' petition for cer-tiorari. On certiorari, Topanotes argues that the court of appeals erred when it remanded for further factual findings rather than resolving the alternative ground for affirmance based on the record before it. The State argues that remand was appropriate, and on eross-appeal asserts that remand would not be necessary because the record supports application of the inevitable discovery exception to the exclusionary rule in this case.
ANALYSIS
I. STANDARD OF REVIEW
18 "On certiorari, we review the decision of the court of appeals, not the ... trial court." State v. James,
II. PROPRIETY OF THE COURT OF APPEALS' REMAND ORDER
19 Topanotes' first argument is that the court of appeals was required to resolve the issue of inevitable discovery on the existing record because it was an alternative ground for affirmance raised first on appeal.
It is well settled that an appellate court may affirm the judgment appealed from "if it is sustainable on any legal ground or theory apparent on the record, even though such ground or theory differs from that stated by the trial court to be the basis of its ruling or action, and this is true even though such ground or theory is not urged or argued on appeal by appellee, was not raised in the lower court, and was not considered or passed on by the lower сourt."
Bailey v. Bayles,
{10 The State argues that there is an "alternative grounds continuum," marked at one end by cases readily affirmed as a matter of law based on the record, and at the other end by cases where "neither affirmance or remand for further fact-finding is justified because the alternative grounds for affir-mance are (1) inadequately briefed or (2) clearly rebutted in the record." According to the State, this case falls into a middle ground, where the alternative ground for af-firmance, while apparent on the record, requires further development by the trial court before it may be sustained. When the issue is highly fact sensitive, argues the State, it is appropriate for an appellate court to remand for further factual findings.
{11 However, none of the cases citеd by the State deal with an alternative ground for affirmance, raised for the first time on appeal, after a trial court has entered a judgment and sentence in a criminal case. Nor could we find any authority for the proposition that the State, after having had one opportunity to establish the admissibility of
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evidence in the face of a Fourth Amendment challenge, is entitled tо a remand to put on new evidence under a new theory of admissibility. In fact, we have previously held that when the State has the burden of proof and the record on appeal fails to sustain any theory of admissibility, the State "is not entitled to a remand to put on new evidence." State v. Hodson,
III. INEVITABLE DISCOVERY
112 On cross-petition, the State argues that remand is unnecessary in this case because there is compelling evidence in the record that the heroin inevitably would have been discovered even without the illegal detention. Therefore, the trial court's denial of the motion to suppress should be affirmed on the alternative ground that the inevitable discovery exception to the exclusionary rule applies.
118 The exclusionary rule prohibits the use at trial of evidence, both primary and derivative (the "fruit of unlawful police conduct"), obtained in violation of an individual's constitutional and statutory rights. Nix v. Williams,
114 The inevitable discovery doe-trine at issue in this case is similar to the independent source doctrine; it enables courts to look to the facts and cireumstances surrounding the discovery of the tainted evidence and asks whether the police would have discovered the evidence despite the illegality. "If the prosecution can establish by a preponderance of the evidence that the information ultimately or inevitably would have been discovered by lawful means ... then the deterrence rationale has so little basis that the evidence should be received." Nix,
15 Some jurisdictions require that there be an entirely separate, ongoing investigation before applying the inevitable discovery doe-trine. See, e.g., United States v. Lamas,
There will be instances where, based on the historical faсts, inevitability is demonstrated in such a compelling way that operation of the exclusionary rule is a mechanical and entirely unrealistic bar, preventing the trier of fact from learning what would have come to light in any case. In such cases, the inevitable discovery doctrine will permit introduction of the evidence, whether or not two independent investigations were in progress.
United States v. Boatwright,
[9,101 116 A crucial element of inevit-. able discovery is independence; there must be some "independent basis for discovery," Boatwright,
17 Routine or standard police procedures are often a compelling and reliable foundation for inevitable discovery, even if not part of a separate, concurrent investigation. For example, police searches that would occur after the evidence is legally in their custоdy, such as routine inventory searches of vehicles impounded after the driver is arrested, are often persuasive evidence of potential independent sources of discovery. See, e.g., United States v. Seals,
T18 In Boatwright, officers conducting a routine probation investigation unlawfully searched a building in close proximity to the probationer's and discovered two shotguns that led to the conviction of Rickie, the probationer's brother. Boatwright,
119 In the case at hand, there was only one ongoing investigation that led to the arrest and search of Topanotes and the discovery of the heroin. The State's argument requires us to find that the chain of events that did occur would have occurred in exactly the same manner had Tоpanotes not been unlawfully detained. There are at least two serious flaws in the State's position. First, the argument that " '[ilf we hadn't done it wrong, we would have done it right, " Thomas,
T 20 The second flaw is found in the State's argument that, because Topanotes was cooperative during the unlawful investigatory stop that did occur, she would have been equally cooperative during the hypothetical, legal investigatory stop that would have occurred. Cases that rely upon individual behavior as a crucial link in the inevitable discovery chain, particularly when that behavior is heavily influenced by the illegality that did occur, rarely sustain an inevitable discovery theory. See, e.g., Thomas,
21 While the situation could havе developed in the manner hypothesized by the State, we are not persuaded that it would have led to legal discovery of the evidence in question. The State offers no other compelling scenario or hypothetical independent source for discovery of the evidence in question. Thus, we hold that the evidence is not admissible under the inevitable discovery exсeption to the exclusionary rule.
CONCLUSION
122 The court of appeals erred when it remanded to the trial court for new evidence on the issue of inevitable discovery. Alternative grounds for affirmance that are raised for the first time on appeal must be supported and sustained by the record and the factual findings of the trial court. Based on the record before us, we find that the inevitable discovery exception to the exclusionary rule cannot be sustained, and that, therefore, the evidence in this case should have been suppressed. We vacate the court of appeals' remand order and reverse the trial court's denial of Topanotes' motion to suppress. We remand to the trial court for proceedings consistent with this opinion.
