October Term 2011 · Docket 10-1259

Does attaching a GPS tracker to a car violate the Fourth Amendment?

The dispute centers on whether police physically attaching a GPS device to a vehicle constitutes a seizure under the Fourth Amendment.

Official caption
United States v. Jones
Latest argument session
Latest official Court activity
Latest verified event
Argued
Sources analyzed through
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. Dreeben argued that Katz created a basic dichotomy. He stated that technology cuts in two directions.

    Mr. Leckar focused on the seizure issue. He noted that the government did not address this specific point.

    Chief Justice Roberts highlighted the change in technology. He noted that following cars requires significant effort.

    Justice Alito stated that the issue gets to the core of the case. He emphasized the importance of the physical act.

    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

The case involves a physical attachment of a tracking device to a car. The government argues this action does not violate privacy rights. The defendant argues the physical act itself is a seizure.

Official sources for this section

How the case got here

The Supreme Court heard oral argument in this case on November 8, 2011.

Official sources for this section

What each side wants

The government wants the Court to affirm the lower court ruling. It argues the tracking did not violate the Fourth Amendment.

The defendant wants the Court to reverse the lower court ruling. It argues the physical attachment was an unlawful seizure.

Official sources for this section

What each side says

The government argues that Katz established a dichotomy. It claims technology changes privacy expectations but does not create seizures.

The defendant argues that the physical attachment is a seizure. It contends that sneaky actions do not automatically become trespasses.

Official sources for this section

What the justices asked

Justice Scalia asked if sneaky actions are always trespasses. He questioned the definition of physical intrusion.

Justice Kennedy asked if a beeper could be placed on a coat. He explored the scope of physical attachment arguments.

Official sources for this section

Why it matters

This case defines the limits of physical police intrusion. It determines whether attaching devices to property triggers Fourth Amendment protections. The outcome shapes future surveillance methods and privacy rights.

Official sources for this section

What happens next

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

Official sources for this section

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.

Download this sanitized case as JSON