ACLU, EFF Contend Government Needs Probable Cause & Warrant to Track Cell Phones

From the American Civil Liberties Union of Texas:

The American Civil Liberties Union (ACLU) and American Civil Liberties Union of Texas have joined the Electronic Frontier Foundation (EFF) in opposing federal government attempts to obtain cell phone users’ historical location data from cell phone service providers without establishing probable cause and obtaining a warrant.

In an amicus (friend of the court) brief filed Friday in U. S. District Court for the Southern District of Texas in Houston, EFF and the ACLU argue that absent judicial safeguards, the government’s ability to obtain detailed information about a person’s location using historical cell phone data may violate the Fourth Amendment.

Amicus brief of ACLU and EFF