http://www.washingtontimes.com/news/2018/jun/22/scotus-warrant-required-cellphone-location-data/

The Supreme Court on Friday said the government must obtain a search warrant before demanding an individual'scellphonelocation records from atelecommunications company.

In the 5-4 decision, the court said it's a violation of the 4th Amendment for police to search a suspect's cell-site location information (CSLI), which is stored by a telecommunications company, without a warrant.