Whether a police officer who obtains an arrest warrant by submitting a complaint and affidavit is absolutely immune from § 1983 damages liability when the warrant allegedly lacked probable cause.
Holding
No. An officer who applies for an arrest warrant receives qualified immunity, not absolute immunity.
Reasoning
The Court began with its usual § 1983 immunity inquiry: it looks to the common-law immunities that existed when Congress enacted the statute in 1871, while also considering whether the statute's history and purposes support recognizing that protection. Qualified immunity is the ordinary rule for executive officials, and an official seeking absolute immunity bears the burden of justifying that exceptional protection.
Malley argued that he functioned like a complaining witness. But the common law did not absolutely immunize a person who procured an arrest warrant through a complaint. A complainant could be liable for malicious prosecution when the complaint was made maliciously and without probable cause. That historical rule therefore did not support converting the officer's qualified protection into absolute immunity.
The Court also rejected Malley's analogy to a prosecutor seeking an indictment. Prosecutors receive absolute immunity for conduct intimately associated with the judicial phase of the criminal process, and that protection reflects a common-law tradition as well as the need to preserve prosecutorial independence throughout the effort to secure a conviction. An officer's warrant application, although important to criminal justice, is more removed from that judicial role.
Qualified immunity adequately protects officers from insubstantial suits. Under the Harlow standard, an officer is liable only when it would be obvious that no reasonably competent officer would have concluded that a warrant should issue; where reasonably competent officers could disagree, immunity applies. Requiring officers to exercise professional judgment before seeking a warrant also serves the judicial process by reducing premature warrant requests and unjustified arrests.