Yesterday we asked the Third Circuit Court of Appeals to consider our argument that law enforcement agents should have to obtain a warrant based on probable cause to attach a GPS tracker to a car and track its movements (you can read our amicus brief here).

In the case, the government suspected that Harry, Mark and Michael Katzin had robbed a number of Rite-Aid pharmacies. To confirm their hunch they attached a GPS tracker—without first going to a judge and getting a warrant—to Harry Katzin’s car.