Cross-Enforcement of the Fourth Amendment

65 Pages Posted: 19 Mar 2018 Last revised: 10 Jul 2018

Orin S. Kerr

University of Southern California Gould School of Law

Date Written: March 15, 2018

Abstract

This Article considers whether government agents can conduct searches or seizures to enforce a different government’s law. For example, can federal officers make stops based on state traffic violations? Can state police search for evidence of federal immigration crimes? Lower courts are deeply divided on the answers. The Supreme Court’s decisions offer little useful guidance because they rest on doctrinal assumptions that the Court has since squarely rejected. The answer to a fundamental question of Fourth Amendment law – who can enforce what law – is remarkably unclear.

After surveying current law and constitutional history, the Article offers a normative proposal to answer this question. Each government should have the power to control who can enforce its criminal laws. Only searches and seizures by those authorized to act as agents of a sovereign trigger the government interests that justify reasonableness balancing based on those interests. The difficult question is identifying authorization: Questions of constitutional structure suggest different defaults for enforcement of federal and state law. Outside the Fourth Amendment, governments can enact statutes that limit how their own officers enforce other laws. The scope of federal power to limit federal enforcement of state law by statute should be broader, however, than the scope of state power to limit state enforcement of federal law.

Keywords: Fourth Amendment, Search and Seizure, Federalism

JEL Classification: K1, K14, K42

Suggested Citation

Kerr, Orin S., Cross-Enforcement of the Fourth Amendment (March 15, 2018). Harvard Law Review, Forthcoming; USC Law Legal Studies Paper No. 18-15. Available at SSRN: https://ssrn.com/abstract=3141086

Orin S. Kerr (Contact Author)

University of Southern California Gould School of Law ( email )

699 Exposition Boulevard
Los Angeles, CA 90089
United States

HOME PAGE: http://gould.usc.edu/faculty/?id=73523

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