Immigration Article of the Day: Detained at the Border: Electronic Device Searches, Biometrics, and Policy Continuity (2001–2025) by Siddhartha Harsh Wardhan
Abstract
This working paper explains the U.S. “border search” doctrine as it applies to U.S. citizens and lawful permanent residents (green card holders), with a particular focus on electronic device searches and facial biometric programs at ports of entry. Drawing on Supreme Court precedents (e.g., Ramsey, Montoya de Hernandez, Flores–Montano), recent circuit decisions (Cotterman, Cano, Alasaad), as well as DHS/CBP directives and statistics, we outline what officers can lawfully do, what requires heightened suspicion, and how policies have evolved across four administrations. We demonstrate that, although public rhetoric has become, core authorities—such as warrantless “basic” device searches at the border, thresholds for prolonged detention, and the rapid adoption of facial comparison—have essentially remained unchanged—title 42 public-health expulsions ended on May 11, 2023, with processing returning to Title 8. Policy options include standardized auditing of “advanced” device searches, more precise limits on data retention and sharing, and consistent notice and opt-out procedures for biometrics.
