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Columbia Law School

Law Enforcement and Corrections

Fourth amendment

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Full-Text Articles in Law

The End Of Intuition-Based High-Crime Areas, Ben Grunwald, Jeffrey A. Fagan Jan 2019

The End Of Intuition-Based High-Crime Areas, Ben Grunwald, Jeffrey A. Fagan

Faculty Scholarship

In 2000, the Supreme Court held in Illinois v. Wardlow that a suspect’s presence in a “high-crime area” is relevant in determining whether an officer has reasonable suspicion to conduct an investigative stop. Despite the importance of the decision, the Court provided no guidance about what that standard means, and over fifteen years later, we still have no idea how police officers understand and apply it in practice. This Article conducts the first empirical analysis of Wardlow by examining data on over two million investigative stops conducted by the New York Police Department from 2007 to 2012.

Our results suggest …


Streaming The International Silver Platter Doctrine: Coordinating Transnational Law Enforcement In The Age Of Global Terrorism And Technology, Caitlin T. Street Jan 2011

Streaming The International Silver Platter Doctrine: Coordinating Transnational Law Enforcement In The Age Of Global Terrorism And Technology, Caitlin T. Street

National Security Law Program

The dramatic expansion of technology and globalization over the last thirty years has not only facilitated transnational terrorist operations, but also has transformed the countermeasures utilized by law enforcement and amplified the need for counterterrorism coordination between foreign and domestic authorities. Crucially, these changes have altered the fourth amendment calculus, set out by the international silver platter doctrine, for admitting evidence seized in U.S.-foreign cooperative searches abroad. Under the international silver platter doctrine, courts admit the evidence gathered by foreign authorities abroad unless the unreasonable search is deemed a "joint venture" between U.S. and foreign authorities. Notably, the legal framework …