Commonwealth v. Augustine

EFF filed an amicus brief with the Massachusetts Supreme Judicial Court, asking it to rule police must get a search warrant in order to access historical cell site information. We argued that as cell phones and especially smartphones become prevalent, and the number of cell towers and cell sites increases, the location information revealed by cell sites becomes more precise. Since location information provides details on a person's movements, associations and affiliations, we argue that it must be protected by a search warrant requirement.

In February 2014, the court agreed with us, ruling that police must obtain a search warrant in order to obtain long term cell site data.

Kit Walsh of the Berkman Center for Internet and Society at Harvard Law School served as our local counsel.

Case status: 

Stay in Touch

NSA Spying

EFF is leading the fight against the NSA's illegal mass surveillance program. Learn more about what the program is, how it works, and what you can do.

Follow EFF

Copyright should not be used to turn students into criminals for sharing a research paper online. https://eff.org/r.uy7p #standwithdiego

Jun 30 @ 12:38pm

Are you an amazing writer looking to defend the future of civil liberties? We have the perfect job for you: https://eff.org/r.2773

Jun 30 @ 10:43am

Illinois drone task force would have 22 members, mostly cops and industry reps, but not a single privacy advocate https://eff.org/r.6isf

Jun 29 @ 3:53pm
JavaScript license information