The slow pace of Fourth Amendment change

In Protections for Electronic Communications: the Stored Communications Act and the Fourth Amendment, Alexander Scolnik wrote:

As technology evolves, giving individuals new forms of communicating and government agents increasingly sophisticated tools for surveillance, courts have had to continually interpret the Fourth Amendment and define the extent of its reach in light of these new advances.

Constitutionalizing the sanctity of the mails

Anuj C. Desai explains that the extension of the Fourth Amendment to cover postal mail, and then later to telephones, is based not so much on the inherently Constitutional nature of opening mail, but instead on the increasingly firm belief in the sanctity of the mail as expressed by Congress, legislators, and the public.

Should police need probable cause to request mobile-phone location data?

There are currently no firm standards on the kinds of Fourth Amendment protections that should apply to cell phone tracking data. This is becoming an issue as GPS and other tracking technologies have been added to cell phone to satisfy E911 requirements, and as police agencies have discovered the potential benefits of mobile-phone location data.