Yesterday, the government filed a response brief in Carpenter v. United States, arguing that the Sixth Circuit Court of Appeals decision holding that the government's acquisition of cell phone records did not violate the Fourth Amendment should be affirmed. Counsel for Timothy I. Carpenter filed the cert petition on September 26, 2016, which was granted on June 5, 2017. You can read the full brief here:

Prior Lawfare coverage can be found here and here. Additional documents related to the case can be found here.