Digital Fences and Constitutional Defenses: Geofencing and the Fourth Amendment amid United States V. Smith

Abstract

The rapid adoption of geofence warrants by law enforcement has created an urgent need to examine their constitutionality under the Fourth Amendment. These digital dragnets, which collect location data from all devices within a specified area and time period, have become increasingly controversial as their use has expanded from investigating serious crimes to more routine matters. This Article analyzes the recent circuit split between the Fourth Circuit’s United States v. Chatrie and the Fifth Circuit’s United States v. Smith to explore how courts are adapting traditional Fourth Amendment principles to this novel surveillance technology.

The author conducted comprehensive research of Fourth Amendment jurisprudence, from its historical origins through landmark digital privacy cases, examining how courts have previously balanced privacy rights against law enforcement needs. Through analysis of court decisions, privacy policies, and market responses, this Article reveals the growing tension between investigative efficiency and constitutional protections in the digital age.

The research demonstrates that while geofence warrants can be valuable investigative tools, their broad scope threatens to undermine fundamental Fourth Amendment protections against general warrants. The Article proposes several solutions, including limits on the third-party doctrine, heightened evidentiary standards, and proportionality requirements based on crime severity. Additionally, it examines how market-driven privacy protections from tech companies could complement legal frameworks. The Article concludes that courts must establish meaningful constraints on geofence warrants to preserve both public safety and constitutional rights, with specific recommendations for judicial and legislative action.

JEL Classification: K10, K14, K30, K42, K40, K24