Thanks to advancing technology, the police can now easily and cheaply monitor public spaces and identify, profile, and track individuals. Can the Fourth Amendment protect us from sweeping government digital surveillance? Nathan Wessler, a deputy director of the ACLU’s Speech, Privacy, and Technology Project, joins the show to discuss. For more, check out the ACLU’s cert. petition in Moore v. United States, which argues that the police need a warrant to conduct 24/7 camera surveillance outside a home.