Police do not need a warrant to obtain a person's cellphone location data held by wireless carriers, a U.S. appeals court ruled on Tuesday, dealing a setback to privacy advocates.
The full 4th U.S. Circuit Court of Appeals in Richmond, Virginia, voted 12-3 that the government can get the information under a decades-old legal theory that it had already been disclosed to a third party, in this case a telephone company.
The ruling overturns a divided 2015 opinion from the court's three-judge panel and reduces the likelihood that the Supreme Court would consider the issue.