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University of Chicago Legal Forum

Abstract

Section 1324 of Title 8 of the U.S. Code prohibits “harboring” undocumented immigrants. But for decades, courts have disagreed over what counts as harboring and what mens rea is required to prove it. These questions have only grown more urgent as immigration has been repeatedly framed as a national crisis. A lack of uniformity in the application of § 1324 has enabled expansive enforcement of the anti-harboring provision, allowing a single statute to target both humanitarian actors providing sanctuary and traffickers exploiting immigrants.

Today, a circuit split reflects two competing approaches. The Third, Fifth, Sixth, and Eighth Circuits use a broad “substantial facilitation” test, focusing on whether a defendant’s actions make it easier for an undocumented immigrant to remain in the United States. In contrast, the Second, Seventh, and Ninth Circuits require proof of intent to harbor. The Eleventh Circuit adopts a hybrid approach, requiring knowing conduct that substantially facilitates concealment.

This Comment argues that courts should apply different mens rea standards depending on context: a narrow intent standard in sanctuary cases and a broader substantial facilitation standard in trafficking cases. This framework better reflects the moral and legal distinctions between protection and exploitation, aligns with legislative history and intent, and draws on established criminal law principles that vary culpability based on motive. Alternatively, this Comment proposes that courts should incorporate motive into the substantial facilitation test, distinguishing sanctuary from trafficking in practice. Clarifying § 1324’s mens rea requirement would bring needed coherence to a fragmented doctrine, reduce the chilling of humanitarian aid, and better target the exploitation the statute was originally meant to address.

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