Which case established that a search after an arrest does not include the search of a cell phone?

• A. Riley v. California
• B. Terry v. Ohio
• C. Maryland v. Buie
• D. Gant v. Arizona

Answer: (A)

The case that established the principle that a search conducted after an arrest does not extend to the contents of a cell phone is Riley v. California. This landmark decision determined that the digital data contained in a cell phone is distinct from other physical items that may be found on a person at the time of arrest. The Supreme Court recognized that cell phones hold vast amounts of personal information and, therefore, require a warrant for their search in order to protect an individual's Fourth Amendment rights against unreasonable searches and seizures.

The Court emphasized the need for privacy regarding personal data that is far more extensive than what was traditionally found on physical objects, highlighting the differences between modern technology and previous cases involving searches of physical items. This ruling underscored the importance of maintaining digital privacy in an era where smartphones are central to daily life, thus requiring law enforcement to obtain a warrant to explore the contents of a cell phone following an arrest.