October Term 2013 · Docket 12-9490

Can police stop a car based solely on an anonymous tip of reckless driving?

The dispute centers on whether officers need independent verification before stopping a vehicle based on an anonymous report of dangerous driving.

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Prado Navarette v. California
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Official Transcript

Verified source milestones

  1. — An official oral-argument transcript was verified.
  2. — An official oral-argument transcript was verified.

The arguments, in order

This case may have been argued more than once. Each entry below uses that session's official transcript. Later arguments do not erase earlier ones.

  1. Argument 1 ·

    What happened at the argument

    Mr. Kleven argued that officers must corroborate anonymous tips before making a stop.

    Ms. Kovner argued that brief stops based on anonymous tips are reasonable under the Fourth Amendment.

    Mr. Laurence argued that officers may act on anonymous tips of reckless driving immediately.

    Read the official transcript for this argument · Official argument details

    Sources used for this argument breakdown

A citizen's guide to the whole case

What this case is about

This case tests the Fourth Amendment limits on traffic stops. It asks if an anonymous tip alone provides enough probable cause for a brief detention.

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How the case got here

The Supreme Court heard oral argument in this case on January 21, 2014.

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What each side wants

the side that brought the case wants the Court to require police to corroborate anonymous tips before stopping a vehicle.

The state wants the Court to allow stops based solely on anonymous tips of reckless driving.

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What each side says

the side that brought the case argues that uncorroborated anonymous tips lack the reliability needed to justify a seizure.

The state argues that stopping cars based on anonymous tips serves a critical public safety interest.

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What the justices asked

Chief Justice Roberts asked if there is evidence that false anonymous tips are a serious problem.

Justice Alito asked for examples of stops based on tips without observing illegal acts directly.

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Why it matters

This case defines the balance between public safety and individual liberty during traffic stops. It determines how much evidence police need before detaining drivers. The outcome shapes future interactions between law enforcement and citizens on roads.

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What happens next

This article currently covers the argument record. Use the official docket link for later case activity.

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Official Court provenance

Official docket and case history · Official Supreme Court oral-argument detail page

Title and summary sources

Revision history

  1. Revision 1 · Official Transcript ·

    Correction: Rewritten to the concise citizen-facing editorial standard.

  2. Revision 2 · Official Transcript ·

    Correction: Migrated to the dated official Court activity contract without model use.

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