Arrests under witness warrants
Ashcroft v. Abdullah al-Kidd
In brief
Ashcroft was protected from damages because the Court found the law was not clear enough at the time, and the case went back to the Ninth Circuit.
- Where it stands
- Decided
Decided 8-0 · May 31, 2011 · Opinion by Justice Scalia
- What it’s about
- Abdullah al-Kidd sought damages from former Attorney General John Ashcroft, alleging the government used a material-witness warrant as a pretext to detain him.
- Who it affects
- Ashcroft cannot be held liable for damages on al-Kidd’s claim because the Court found the relevant Fourth Amendment rule was not clearly established when al-Kidd was arrested.
Summary: written with AI from the case record.
What it's about
The Supreme Court overturned the Ninth Circuit’s ruling and sent the case back to the lower court (remanded), deciding Ashcroft was protected from damages by qualified immunity because the asserted Fourth Amendment rule was not clearly established.
A material-witness warrant allows an arrest to secure someone's testimony in a criminal case when it may be hard to get the person to appear by subpoena.
Question presented
Is the former government official entitled to qualified immunity from the pretext claim based on the conclusions that (a) the Fourth Amendment prohibits an officer from executing a valid material witness warrant with the intent of conducting further investigation or preventively detaining the subject; and (b) this Fourth Amendment rule was clearly established at the time of Al-Kidd's arrest?
What the Court decided
Holding
Ashcroft did not violate clearly established law and thus is entitled to qualified immunity. A Government official’s conduct violates clearly established law when, at the time of the challenged conduct, “[t]he contours of [a] right [are] sufficiently clear” that every “reasonable official would have understood that what he is doing violates that right.” Anderson v. Creighton, 483 U. S. 635,
- Result
- Reversed
The Court's reasoning
The Court said an official can face damages only if the law was clear enough that every reasonable official would have known the conduct was unlawful. It concluded that standard was not met for the rule al-Kidd asserted, so Ashcroft was protected from damages.
The vote
- Joined the judgment
- Concurred in a separate opinion
- Wrote an opinion
- Majority · 5joined the Court's opinion
- Concurring · 3agreed with the result, wrote separately
- Breyer
- Ginsburgwrote separately
- Sotomayorwrote separately
What's next
The case returns to the Ninth Circuit for further proceedings under the Supreme Court’s ruling.
Documents
Opinions
Audio
Docket activity
New analysis added
AI analysis generated: Impact Analysis
AI analysis generated: Opinion Summary
New analysis added
AI analysis generated: Case Briefing
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AI analysis generated: Decision Record
Case data updated: summary, question_presented, generation_metadata
Case data updated: question_presented, extraction_metadata
Audio Recording added: Oral Arguments - al-Kidd
Opinion added: al-Kidd
More questions
- Did the Supreme Court decide whether the warrant was used unlawfully?
- No. It left unresolved whether the government’s use of the material-witness statute in al-Kidd’s case was lawful.
Sources
Primary materials plus reporting. Best-effort analysis: this explainer relies on a mix of primary materials and trusted secondary sources. Official filings and opinions remain authoritative.