Can the police search a person s cellphone without a warrant Are they allowed to get data about the locations of your cell phone from the phone company without a warrant The Supreme Court has weighed in on these questions with two key rulings in Riley v California and in Carpenter v United States In this paper I will explain what part s of the Constitution protect the rights of citizens from unreasonable searches what the Supreme Court decided in each of these cases and why I will also explain why some Supreme Court justices did not agree with the ruling in Carpenter v United States Sources to Consult Carpenter v United States n d Oyez Retrieved August 11 2021 from https www oyez org cases 2017 16 402 Legal Information Institute n d Fourth Amendment Retrieved August 11 2021 from https www law cornell edu constitution fourth amendment Levinson Waldman Rachael June 7 2018 Cell Phone Privacy at the Supreme Court Does the government need a warrant to find out where your cell phone s been The Supreme Court is about to weigh in Brennan Center for Justice https www brennancenter org our work analysis opinion cell phone privacy supreme court Liptak Adam June 22 2018 In Ruling on Cellphone Location Data Supreme Court Makes Statement on Digital Privacy New York Times https www nytimes com 2018 06 22 us politics supreme court warrants cell phone privacy html Riley v California n d Oyez Retrieved July 19 2019 from https www oyez org cases 2013 13 132