Knight Institute Senior Staff Attorney Alex Abdo participates in a debate on Carpenter v. United States, a 2017 Supreme Court case on government access to historical cell-site records. Abdo argues that the government must get a warrant to access cell phone location information or risk chilling free speech and violating people's Fourth Amendment rights. Orin Kerr of George Washington Law School argues that accessing those records does not constitute a "search." Jeffrey Rosen, president of the National Constitution Center, moderates the panel.


The Knight Institute's amicus brief in Carpenter v. United States.