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In Carpenter v. United States, the Supreme Court reaffirmed the continuing vitality of the privacy framework Katz v. United States established in 1967 for identifying Fourth Amendment searches. Justice Gorsuch, in dissent, critiqued Katz as indeterminate and inconsistent with democratic values. In this Article, I analyze Justice Gorsuch's proposed alternative framework, which he described as the “traditional approach” to determining Fourth Amendment interests. Instead of grappling with the indefinite and textually and historically unfounded “reasonable expectations of privacy” framework of Katz, Justice Gorsuch asserted, this traditional test would require judges to focus on whether a “house, paper, or effect was yours under law.” Although Justice Gorsuch offered preliminary thoughts on this rubric, his opinion left open important questions, including the sources of law to which the Court should look in identifying property interests; the breadth of the definitions of “papers” and “effects” and the kinds of property closely enough associated with the person for potential implication of Fourth Amendment rights; and the ways in which government conduct impinging on such property interests might trigger Fourth Amendment protection. Several passages in Justice Gorsuch's opinion suggest that he would take a broad, flexible approach to each of these issues. Overall, whatever ambiguities exist in Justice Gorsuch's dissent, it is certain that his property model would be more expansive than the pre-Katz trespass test that the Court rehabilitated in 2012. If that is the case, however, then the results that courts would be likely to reach under this framework might closely resemble outcomes under a principled privacy-based analysis. Additionally, because a broad property rubric would involve a significant degree of judicial discretion, it would replicate Katz's indeterminacy. Thus, while Justice Gorsuch's approach might carry forward the benefits associated with Katz's flexibility, it would also reproduce Katz's associated flaws, including manipulability and democratic illegitimacy. Nonetheless, Justice Gorsuch might favor a flexible “traditional approach” over Katz because its explicit attention to the language of the Fourth Amendment is more conceptually elegant and, at least aesthetically, more consistent with Justice Gorsuch's originalist sympathies.

Original languageEnglish (US)
Pages (from-to)425-476
Number of pages52
JournalHarvard Journal of Law and Public Policy
Issue number2
StatePublished - 2020

All Science Journal Classification (ASJC) codes

  • Sociology and Political Science
  • Law

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