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University of Michigan Law School

United States Supreme Court

Fourth Amendment

2015

Articles 1 - 3 of 3

Full-Text Articles in Law

Voluntary Disclosure Of Information As A Proposed Standard For The Fourth Amendment's Third-Party Doctrine, Margaret E. Twomey Jun 2015

Voluntary Disclosure Of Information As A Proposed Standard For The Fourth Amendment's Third-Party Doctrine, Margaret E. Twomey

Michigan Telecommunications & Technology Law Review

The third-party doctrine is a long-standing tenant of Fourth Amendment law that allows law enforcement officers to utilize information that was released to a third party without the probable cause required for a traditional search warrant. This has allowed law enforcement agents to use confidential informants, undercover agents, and access bank records of suspected criminals. However, in a digital age where exponentially more information is shared with Internet Service Providers, e-mail hosts, and social media “friends,” the traditional thirdparty doctrine ideas allow law enforcement officers access to a cache of personal information and data with a standard below probable cause. …


Supreme Court Jurisprudence Of The Personal In City Of Los Angeles V. Patel, Brian L. Owsley Jan 2015

Supreme Court Jurisprudence Of The Personal In City Of Los Angeles V. Patel, Brian L. Owsley

Michigan Law Review First Impressions

Recently, the Supreme Court issued a 5-4 decision in City of Los Angeles v. Patel striking down a city ordinance that required hotel and motel owners to make their guest registries available to police officers whenever requested to do so. Although the Court’s opinion in Patel simply affirmed the Ninth Circuit’s finding that the ordinance was unconstitutional, the Court could have used Patel to readdress the third-party doctrine, which establishes that “a person has no legitimate expectation of privacy in information he voluntarily turns over to third parties.” Patel provided a vehicle for the Court to do so, particularly because …


No More Shortcuts: Protect Cell Site Location Data With A Warrant Requirement, Lauren E. Babst Jan 2015

No More Shortcuts: Protect Cell Site Location Data With A Warrant Requirement, Lauren E. Babst

Michigan Telecommunications & Technology Law Review

In modern society, the cell phone has become a virtual extension of most Americans, managing all kinds of personal and business matters. Modern cell tower technology allows cell service providers to accumulate a wealth of individuals’ location information while they use their cell phones, and such data is available for law enforcement to obtain without a warrant. This is problematic under the Fourth Amendment, which protects reasonable expectations of privacy. Under the Katz two-prong test, (1) individuals have an actual, subjective expectation of privacy in their cell site location data, and (2) society is prepared to acknowledge that expectation as …