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Opinion of the Court
555, 565 (1978)). Harlow adopted this criterion of "objective legal reasonableness," rather than good faith, precisely in order to "permit the defeat of insubstantial claims without resort to trial." 457 U. S., at 819, 813. Unsurprisingly, then, we later found the immunity to be "an entitlement not to stand trial or face the other burdens of litigation, conditioned on the resolution of the essentially legal [immunity] question." Mitchell v. Forsyth, 472 U. S., at 526. And, as with district-court rejection of claims to other such entitlements distinct from the merits, see, e. g., Puerto Rico Aqueduct, supra, at 145-146 (Eleventh Amendment immunity); Abney v. United States, 431 U. S. 651, 662 (1977) (right not to be subjected to double jeopardy), we held that "a district court's denial of a claim of qualified immunity, to the extent that it turns on an issue of law, is an appealable 'final decision' within the meaning of 28 U. S. C. § 1291 notwithstanding the absence of a final judgment." Mitchell, supra, at 530. See also Johnson v. Jones, 515 U. S. 304, 311-312 (1995).
While Mitchell did not say that a defendant could appeal from denial of a qualified-immunity defense more than once,2 it clearly contemplated that he could raise the defense at successive stages:
"Unless the plaintiff's allegations state a claim of violation of clearly established law, a defendant pleading qualified immunity is entitled to dismissal before the commencement of discovery. Even if the plaintiff's complaint adequately alleges the commission of acts that violated clearly established law, the defendant is entitled to summary judgment if discovery fails to uncover evi-2 Interestingly, however, Mitchell itself dealt with the second of two interlocutory appeals on immunity claims. See 472 U. S., at 515-519. Neither the Court of Appeals nor this Court assigned any significance to the successive aspect of the second appeal.
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