On October 28, the Department of Justice will argue to a District Court Judge in Arizona that neither the public nor criminal defendants should learn about a special investigative tool it uses to track individuals’ location via their cellphones. According to the Wall Street Journal, law enforcement and the military are regularly using such devices, called “Stingrays”. In the Arizona case, United States v. Rigmaiden, investigators used the technology to assist them in locating the suspect. That defendant is now asking the court to order the government to turn over information about how stingray functions and how it was used in his arrest so that he can litigate whether use of the device violated his Fourth Amendment rights.
The Center for Internet and Society at Stanford Law School is a leader in the study of the law and policy around the Internet and other emerging technologies.