delivered the opinion of the Court.
This сase presents the question whether an appellate court, reviewing a judgment according public officials quali *512 fied immunity from a damages suit charging violation of a federal right, must disregard relevant legal authority not presented to, or considered by, the court of first instance. We hold that appellate review of qualified immunity dispositions is to be conducted in light of all relevant precedents, not simply those cited to, or discovered by, the district court.
I
In Aрril 1987, police officers in Idaho learned that Charles Elder was wanted by Florida authorities. They set out to arrest Elder, but did not obtain an Idaho arrest warrant. The officers planned to apprehend Elder at his workplace, in a public area where a warrant is not required. See
United States
v.
Watson,
II
Alleging that the warrantless arrest violated his Fourth Amendmеnt right to be secure against unreasonable seizure, Elder sued the arresting officers for damages under 42 U. S. C. § 1983. The doctrine of qualified immunity shields public officials like respondents from damages actions unless their conduct was unreasonable in light of clearly established law. The District Court analyzed Elder’s case in three steps. Had the arrest occurred inside the house, that court recognized, clear law would come into play: absent exigent circumstances, an аrrest warrant would have been required. See
On appeal, the Ninth Circuit noticed precedent in point missed in the District Court:
United States
v.
Al-Azzawy,
Elder could not benefit from the rule reaffirmed in
AlAzzawy,
the Court of Appeals believed, because that precеdent had been unearthed too late. For the conclusion that cases unmentioned in the District Court could not control on appeal, the Court оf Appeals relied on
Davis
v.
Scherer,
Although typing the qualified immunity inquiry “a ‘pure questiofn] of law,’”
Ill
The central purpose of affording public officials qualified immunity from suit is to protect them “from undue interference with their duties and from potentially disabling threats of liability.”
Harlow
v.
Fitzgerald,
In thinking its rule compellеd by this Court’s instruction, the Ninth Circuit misconstrued
Davis
v.
Scherer.
The Court held in
Davis
that an official’s clear violation of a state administrative regulation does not allow a § 1983 plaintiff to overcоme the official’s qualified immunity. Only in this context is the Court’s statement comprehensible: “A plaintiff who seeks damages for violation of constitutional or statutory rights may overcome the defendant official’s qualified immunity only by showing that
those
rights were clearly established____”
Davis
v.
Scherer,
*516
Whether an asserted federal right was cleаrly established at a particular time, so that a public official who allegedly violated the right has no qualified immunity from suit, presents a question of law, not one of “legal facts.” See
Mitchell
v.
Forsyth,
We leave it to the Court of Appeals to consider, in light of all relevant authority, inсluding Al-Azzawy, whether the respondent officers are entitled to prevail on their qualified immunity defense. We express no opinion on that ultimate issue, nor do we consider whether the officers’ alternate plea of exigent circumstances is tenable.
* * *
For the reasons stated, the judgment of the Court of Appeals is reversed, and the case is remanded for further proceedings consistent with this opinion.
It is so ordered.
Notes
According to depositions before the District Court, Elder had аccess to guns in the house, a consideration that might support an exigent circumstances plea. On the other hand, the police started to plаn for the arrest five days before it occurred, a factor that might tug against a finding of exigency.
Elder’s brief in the Court of Appeals did cite Al-Azzawy, albeit without elаboration. Brief for Appellant in No. 91-35146 (CA9), p. 9. There was cause for Elder’s caution: The ultimate holding of Al-Azzawy was that exigent circumstances justified the warrantless arrest. Cf. n. 1, supra.
The Ninth Circuit’s rule could have a number of untoward effects. It could occasion appellate affirmation of incorrect legal results, seе
