Qualified immunity is a judicially created doctrine that shields government officials from being held personally liable for constitutional violations—like the right to be free from excessive police force—for money damages under federal law so long as the officials did not violate “clearly established” law. Both 42 U.S.C. § 1983—a statute originally passed to assist the government in combating Ku Klux Klan violence in the South after the Civil War—and the Supreme Court’s decision in Bivens v. Six Unknown Named Agents of Federal Bureau of Narcotics (1971) allow individuals to sue government officials for money damages when they violate their constitutional rights. Section 1983 applies to state officials, while Bivens applies to federal officials. Because damages are often the only available remedy after a constitutional violation has occurred, suits for damages can be a crucial means of vindicating constitutional rights. When government officials are sued, qualified immunity functions as an affirmative defense they can raise, barring damages even if they committed unlawful acts. (Qualified immunity is not, however, a defense to claims for injunctive relief.)
