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Syllabus
Where it is feasible, a syllabus (headnote) will be NOTE: released, as is being done in connection with this case, at the time the opinion is issued.The syllabus constitutes no part of the opinion of the Court but has been prepared by the Reporter of Decisions for the convenience of the reader.See United States v. Detroit Timber & Lumber Co., 200 U. S. 321 .

SUPREME COURT OF THE UNITED STATES
PEARSON et al. CALLAHAN
certiorari to the united states court of appeals for the tenth circuit

Argued October 14, 2008—Decided January 21, 2009 No. 07–751.

After the Utah Court of Appeals vacated respondent’s conviction for possession and distribution of drugs, which he sold to an undercover informant he had voluntarily admitted into his house, he brought this 42 U. S. C. §1983 damages action in federal court, alleging that petitioners, the officers who supervised and conducted the warrantless search of the premises that led to his arrest after the sale, had violated the Fourth Amendment . The District Court granted summary judgment in favor of the officers. Noting that other courts had adopted the “consent-once-removed” doctrine—which permits a warrantless police entry into a home when consent to enter has already been granted to an undercover officer who has observed contraband in plain view—the court concluded that the officers were entitled to qualified immunity because they could reasonably have believed that the doctrine authorized their conduct. Following the procedure mandated in Saucier v. Katz, 533 U. S. 194 , the Tenth Circuit held that petitioners were not entitled to qualified immunity. The court disapproved broadening the consent-once-removed doctrine to situations in which the person granted initial consent was not an undercover officer, but merely an informant. It further held that the Fourth Amendment right to be free in one’s home from unreasonable searches and arrests was clearly established at the time of respondent’s arrest, and determined that, under this Court’s clearly established precedents, warrantless entries into a home are per se unreasonable unless they satisfy one of the two established exceptions for consent and exigent circumstances. The court concluded that petitioners could not reasonably have believed that their conduct was lawful because they knew that (1) they had no warrant; (2) respondent had not consented to their entry; and (3) his consent to the entry of an informant could not reasonably be interpreted to extend to them. In granting certiorari, this Court directed the parties to address whether Saucier should be overruled in light of widespread criticism directed at it.
Held:
1. The Saucier procedure should not be regarded as an inflexible requirement. Pp. 5–19.
(a) Saucier mandated, see 533 U. S., at 194, a two-step sequence for resolving government officials’ qualified immunity claims: A court must decide (1) whether the facts alleged or shown by the plaintiff make out a violation of a constitutional right, and (2) if so, whether that right was “clearly established” at the time of the defendant’s alleged misconduct, id., at 201. Qualified immunity applies unless the official's conduct violated such a right. Anderson v. Creighton, 483 U. S. 635 . Pp. 5–7.
(b) Stare decisis does not prevent this Court from determining whether the Saucier procedure should be modified or abandoned. Revisiting precedent is particularly appropriate where, as here, a departure would not upset settled expectations, see, e.g., United States v. Gaudin, 515 U. S. 506 ; the precedent consists of a rule that is judge-made and adopted to improve court operations, not a statute promulgated by Congress, see, e.g., State Oil Co. v. Khan, 522 U. S. 3 ; and the precedent has “been questioned by Members of th[is] Court in later decisions, and [has] defied consistent application by the lower courts,” Payne v. Tennessee, 501 U. S. 808 . Respondent’s argument that Saucier should not be reconsidered unless the Court concludes that it was “badly reasoned” or that its rule has proved “unworkable,” see Payne, supra, at 827, is rejected. Those standards are out of place in the present context, where a considerable body of new experience supports a determination that a mandatory, two-step rule for resolving all qualified immunity claims should not be retained. Pp. 7–10.
(c) Reconsideration of the Saucier procedure demonstrates that, while the sequence set forth therein is often appropriate, it should no longer be regarded as mandatory in all cases. Pp. 10–19.
(i) The Court continues to recognize that the Saucier protocol is often beneficial. In some cases, a discussion of why the relevant facts do not violate clearly established law may make it apparent that in fact the relevant facts do not make out a constitutional violation at all. And Saucier was correct in noting that the two-step procedure promotes the development of constitutional precedent and is especially valuable for questions that do not frequently arise in cases in which a qualified immunity defense is unavailable. See 533 U. S., at 194. Pp. 10–11.
(ii) Nevertheless, experience in this Court and the lower federal courts has pointed out the rigid Saucier procedure’s shortcomings. For example, it may result in a substantial expenditure of scarce judicial resources on difficult questions that have no effect on the case’s outcome, and waste the parties’ resources by forcing them to assume the costs of litigating constitutional questions and endure delays attributable to resolving those questions when the suit otherwise could be disposed of more readily. Moreover, although the procedure’s first prong is intended to further the development of constitutional precedent, opinions following that procedure often fail to make a meaningful contribution to such development, as where, e.g., a court of appeals decision is issued in an opinion marked as not precedential. Further, when qualified immunity is asserted at the pleading stage, the answer to whether there was a violation may depend on a kaleidoscope of facts not yet fully developed. And the first step may create a risk of bad decisionmaking, as where the briefing of constitutional questions is woefully inadequate. Application of the Saucier rule also may make it hard for affected parties to obtain appellate review of constitutional decisions having a serious prospective effect on their operations. For example, where a court holds that a defendant has committed a constitutional violation, but then holds that the violation was not clearly established, the defendant, as the winning party, may have his right to appeal the adverse constitutional holding challenged. Because rigid adherence to Saucier departs from the general rule of constitutional avoidance, cf., e.g., Scott v. Harris, 550 U. S. 372 , the Court may appropriately decline to mandate the order of decision that the lower courts must follow, see, e.g., Strickland v. Washington, 466 U. S. 668 . This flexibility properly reflects the Court’s respect for the lower federal courts. Because the two-step Saucier procedure is often, but not always, advantageous, those judges are in the best position to determine the order of decisionmaking that will best facilitate the fair and efficient disposition of each case. Pp. 11–17.
(iii) Misgivings concerning today’s decision are unwarranted. It does not prevent the lower courts from following Saucier; it simply recognizes that they should have the discretion to decide whether that procedure is worthwhile in particular cases. Moreover, it will not retard the development of constitutional law, result in a proliferation of damages claims against local governments, or spawn new litigation over the standards for deciding whether to reach the particular case’s merits. Pp. 17–19.
2. Petitioners are entitled to qualified immunity because it was not clearly established at the time of the search that their conduct was unconstitutional. When the entry occurred, the consent-once-removed doctrine had been accepted by two State Supreme Courts and three Federal Courts of Appeals, and not one of the latter had issued a contrary decision. Petitioners were entitled to rely on these cases, even though their own Federal Circuit had not yet ruled on consent-once-removed entries. See Wilson v. Layne, 526 U. S. 603 . Pp. 19–20.
494 F. 3d 891, reversed.
Alito, J., delivered the opinion for a unanimous Court.






Justice Alito, Opinion of the Court
This opinion is subject to formal revision before 
NOTICE: publication in the preliminary print of the United States Readers are requested to notify the Reporter of Decisions, Reports. Supreme Court of the United States, Washington, D. C. 20543, of any typographical or other formal errors, in order that corrections may be made before the preliminary print goes to press.
SUPREME COURT OF THE UNITED STATES
CORDELL PEARSON, et al., PETITIONERS v. AFTON
CALLAHAN
on writ of certiorari to the united states court of appeals for the tenth circuit



[January 21, 2009]

Justice Alito delivered the opinion of the Court.
This is an action brought by respondent under Rev. Stat. §1979, 42 U. S. C. §1983, against state law enforcement officers who conducted a warrantless search of his house incident to his arrest for the sale of methamphetamine to an undercover informant whom he had voluntarily admitted to the premises. The Court of Appeals held that petitioners were not entitled to summary judgment on qualified immunity grounds. Following the procedure we mandated in Saucier v. Katz, 533 U. S. 194 (2001) , the Court of Appeals held, first, that respondent adduced facts sufficient to make out a violation of the Fourth Amendment and, second, that the unconstitutionality of the officers’ conduct was clearly established. In granting review, we required the parties to address the additional question whether the mandatory procedure set out in Saucier should be retained.
We now hold that the Saucier procedure should not be regarded as an inflexible requirement and that petitioners are entitled to qualified immunity on the ground that it was not clearly established at the time of the search that their conduct was unconstitutional. We therefore reverse.
I
A
The Central Utah Narcotics Task Force is charged with investigating illegal drug use and sales. In 2002, Brian Bartholomew, who became an informant for the task force after having been charged with the unlawful possession of methamphetamine, informed Officer Jeffrey Whatcott that respondent Afton Callahan had arranged to sell Bartholomew methamphetamine later that day.
That evening, Bartholomew arrived at respondent’s residence at about 8 p.m. Once there, Bartholomew went inside and confirmed that respondent had methamphetamine available for sale. Bartholomew then told respondent that he needed to obtain money to make his purchase and left.
Bartholomew met with members of the task force at about 9 p.m. and told them that he would be able to buy a gram of methamphetamine for $100. After concluding that Bartholomew was capable of completing the planned purchase, the officers searched him, determined that he had no controlled substances on his person, gave him a marked $100 bill and a concealed electronic transmitter to monitor his conversations, and agreed on a signal that he would give after completing the purchase.
The officers drove Bartholomew to respondent’s trailer home, and respondent’s daughter let him inside. Respondent then retrieved a large bag containing methamphetamine from his freezer and sold Bartholomew a gram of methamphetamine, which he put into a small plastic bag. Bartholomew gave the arrest signal to the officers who were monitoring the conversation, and they entered the trailer through a porch door. In the enclosed porch, the officers encountered Bartholomew, respondent, and two other persons, and they saw respondent drop a plastic bag, which they later determined contained methamphetamine. The officers then conducted a protective sweepof the premises. In addition to the large bag of meth-amphetamine, the officers recovered the marked billfrom respondent and a small bag containing meth-amphetamine from Bartholomew, and they found drug syringes in the residence. As a result, respondent was charged with the unlawful possession and distribution of methamphetamine.
B
The trial court held that the warrantless arrest and search were supported by exigent circumstances. On respondent’s appeal from his conviction, the Utah attorney general conceded the absence of exigent circumstances, but urged that the inevitable discovery doctrine justified introduction of the fruits of the warrantless search. The Utah Court of Appeals disagreed and vacated respondent’s conviction. See State v. Callahan, 2004 LIT App. 164, 93 P. 3d 103. Respondent then brought this damages action under 42 U. S. C. §1983 in the United States District Court for the District of Utah, alleging that the officers had violated the Fourth Amendment by entering his home without a warrant. See Callahan v. Millard Cty., No. 2:04–CV–00952, 2006WL 1409130 (2006).
In granting the officers’ motion for summary judgment, the District Court noted that other courts had adopted the “consent-once-removed” doctrine, which permits a warrantless entry by police officers into a home when consent to enter has already been granted to an undercover officer or informant who has observed contraband in plain view. Believing that this doctrine was in tension with our intervening decision in Georgia v. Randolph, 547 U. S. 103 (2006) , the District Court concluded that “the simplest approach is to assume that the Supreme Court will ultimately reject the [consent-once-removed] doctrine and find that searches such as the one in this case are not reasonable under the Fourth Amendment .” 2006 WL 1409130, at *8. The Court then held that the officers were entitled to qualified immunity because they could reasonably have believed that the consent-once-removed doctrine authorized their conduct.
On appeal, a divided panel of the Tenth Circuit held that petitioners’ conduct violated respondent’s Fourth Amendment rights. Callahan v. Millard Cty., 494 F. 3d 891, 895–899 (2007). The panel majority stated that “[t]he ‘consent-once-removed’ doctrine applies when an undercover officer enters a house at the express invitation of someone with authority to consent, establishes probable cause to arrest or search, and then immediately summons other officers for assistance.” Id., at 896. The majority took no issue with application of the doctrine when the initial consent was granted to an undercover law enforcement officer, but the majority disagreed with decisions that “broade[n] this doctrine to grant informants the same capabilities as undercover officers.” Ibid.
The Tenth Circuit panel further held that the Fourth Amendment right that it recognized was clearly established at the time of respondent’s arrest. Id., at 898–899. “In this case,” the majority stated, “the relevant right is the right to be free in one’s home from unreasonable searches and arrests.” Id., at 898. The Court determined that, under the clearly established precedents of this Court and the Tenth Circuit, “warrantless entries into a home are per se unreasonable unless they satisfy the established exceptions.” Id., at 898–899. In the panel’s words, “the Supreme Court and the Tenth Circuit have clearly established that to allow police entry into a home, the only two exceptions to the warrant requirement are consent and exigent circumstances.” Id., at 899. Against that backdrop, the panel concluded, petitioners could not reasonably have believed that their conduct was lawful because petitioners “knew (1) they had no warrant; (2) [respondent] had not consented to their entry; and (3) [respondent’s] consent to the entry of an informant could not reasonably be interpreted to extend to them.” Ibid.
In dissent, Judge Kelly argued that “no constitutional violation occurred in this case” because, by inviting Bartholomew into his house and participating in a narcotics transaction there, respondent had compromised the privacy of the residence and had assumed the risk that Bartholomew would reveal their dealings to the police. Id., at 903. Judge Kelly further concluded that, even if petitioners’ conduct had been unlawful, they were nevertheless entitled to qualified immunity because the constitutional right at issue—“the right to be free from the warrantless entry of police officers into one’s home to effectuate an arrest after one has granted voluntary, consensual entry to a confidential informant and undertaken criminal activity giving rise to probable cause”—was not “clearly established” at the time of the events in question. Id., at 903–904. As noted, the Court of Appeals followed the Saucier procedure. The Saucier procedure has been criticized by Members of this Court and by lower court judges, who have been required to apply the procedure in a great variety of cases and thus have much firsthand experience bearing on its advantages and disadvantages. Accordingly, in granting certiorari, we directed the parties to address the question whether Saucier should be overruled. 552 U. S. ___ (2008).
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