Cite as: 533 U. S. 194 (2001)
Syllabus
sonable officer that the conduct was unlawful in the situation he confronted. See Wilson v. Layne, 526 U. S. 603, 615. The Ninth Circuit's approach—to deny summary judgment if a material issue of fact remains on the excessive force claim—could undermine the goal of qualified immunity to avoid excessive disruption of government and permit the resolution of many insubstantial claims on summary judgment. Harlow v. Fitzgerald, 457 U. S. 800, 818. If the law did not put the officer on notice that his conduct would be clearly unlawful, summary judgment based on qualified immunity is appropriate. The Ninth Circuit concluded that qualified immunity is duplicative in an excessive force case, thus eliminating the need for the second step. In holding that qualified immunity applied in the Fourth Amendment context just as it would for any other official misconduct claim, the Anderson Court rejected the argument that there is no distinction between the reasonableness standard for warrantless searches and the qualified immunity inquiry. In an attempt to distinguish Anderson, Katz claims that the subsequent Graham v. Connor, 490 U. S. 386, decision set forth an excessive force analysis indistinguishable from qualified immunity, thus rendering the separate immunity inquiry superfluous and inappropriate in such cases. Contrary to his arguments, the immunity and excessive force inquiries remain distinct after Graham. Graham sets forth factors relevant to the merits of a constitutional excessive force claim, which include the severity of the crime, whether the suspect poses a threat to the officers or others, and whether he is actively resisting arrest or attempting to evade arrest by flight. Id., at 396. If an officer reasonably, but mistakenly, believed that a suspect was likely to fight back, for instance, the officer would be justified in using more force than in fact was needed. The qualified immunity inquiry's concern, on the other hand, is to acknowledge that reasonable mistakes can be made as to the legal constraints on particular police conduct. An officer might correctly perceive all of the relevant facts, but have a mistaken understanding as to whether a particular amount of force is legal in those circumstances. Pp. 200-207.
2. Petitioner was entitled to qualified immunity. Assuming that a constitutional violation occurred under the facts alleged, the question is whether this general prohibition was the source for clearly established law that was contravened in the circumstances. In the circumstances presented to petitioner, which included the duty to protect the Vice President's safety and security from persons unknown in number, there was no clearly established rule prohibiting him from acting as he did. This conclusion is confirmed by the uncontested fact that the force used—dragging Katz from the area and shoving him while placing
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