Case Citation
Legal Case Name

INS v. LOPEZ-MENDOZA Case Brief

Supreme Court of United States1984
468 U.S. 1032 104 S.Ct. 3479 82 L.Ed.2d 778 Constitutional Law Evidence Administrative Law Criminal Procedure

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Case Brief Summary & Legal Analysis

General Brief
3 min read

tl;dr: The Supreme Court held that the Fourth Amendment’s exclusionary rule, which bars illegally obtained evidence in criminal trials, does not apply in civil deportation proceedings. The Court reasoned that the rule’s deterrent benefits are outweighed by the significant social costs of ignoring an ongoing immigration violation.

Legal Significance: This case significantly limits the scope of the Fourth Amendment’s exclusionary rule, establishing that it does not apply in civil deportation hearings. It solidifies the use of a cost-benefit balancing test to determine the rule’s applicability outside of core criminal prosecutions.

INS v. LOPEZ-MENDOZA Law School Study Guide

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Case Facts & Court Holding

Key Facts & Case Background

Respondents Lopez-Mendoza and Sandoval-Sanchez, both Mexican citizens, were arrested by Immigration and Naturalization Service (INS) agents at their respective workplaces. The agents lacked warrants for the arrests. Following their arrests, both respondents made statements admitting their illegal status in the United States. In separate civil deportation hearings, the government introduced these admissions as evidence of deportability. Sandoval-Sanchez moved to suppress his statements, arguing they were the fruit of an unlawful arrest that violated the Fourth Amendment. Lopez-Mendoza challenged the proceeding itself based on his allegedly illegal arrest. In both cases, the Immigration Judge and the Board of Immigration Appeals (BIA) held that the legality of the arrests was irrelevant in a civil deportation proceeding and refused to apply the exclusionary rule. The Court of Appeals for the Ninth Circuit reversed, holding that the exclusionary rule was applicable. The Supreme Court granted certiorari.

Court Holding & Legal Precedent

Issue: Does the Fourth Amendment’s exclusionary rule, which bars the use of unconstitutionally obtained evidence in criminal trials, apply in a civil deportation proceeding?

No. The Court reversed the Ninth Circuit, holding that evidence derived from Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip

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IRAC Legal Analysis

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IRAC (Issue, Rule, Analysis, Conclusion) is the exact format professors want to see in your exam answers. Our exclusive Flash-to-Full briefs combine holding, analysis, and rule statements formatted to match what A+ students produce in exams. These structured briefs help reinforce the essential legal reasoning patterns expected in law school.

Legal Issue

Does the Fourth Amendment’s exclusionary rule, which bars the use of unconstitutionally obtained evidence in criminal trials, apply in a civil deportation proceeding?

Conclusion

The decision establishes a major exception to the exclusionary rule, confirming that Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat

Legal Rule

The Fourth Amendment's exclusionary rule does not apply in civil deportation proceedings. Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute ir

Legal Analysis

The Court applied the cost-benefit balancing test from *United States v. Janis* Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exe

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  • The Fourth Amendment exclusionary rule does not apply in civil deportation
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea co

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