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Category: reasonable expectation of privacy

The Abandonment of Digital Devices

Our cell phones and laptops normally are subject to a reasonable expectation of privacy, meaning that police cannot search them without a search warrant or an applicable exception to the warrant requirement. But when a person abandons a digital device, he or she relinquishes that expectation of privacy and police may examine the device without a warrant or an exception. This post discusses when a device has been abandoned and explores several common fact patterns.

Update on Pole Cameras and the Fourth Amendment

When an officer attaches a video camera to a utility pole and uses it to monitor a suspect’s home continuously for several months, is that a “search” within the meaning of the Fourth Amendment? Or is it just the officer seeing what any passer-by might see, such that there is no intrusion on the suspect’s reasonable expectation of privacy? This issue has been a focal point of litigation since Carpenter v. United States, 585 U.S. ___, 138 S.Ct. 2206 (2018), which held that the long-term collection of historical cell site location information is so intrusive that it is a search, even though any individual piece of such data does not belong to the phone’s user and is not subject to a reasonable expectation of privacy. Whether the rationale of Carpenter extends to pole cameras has been addressed before on this blog, most recently here and here by Shea Denning. But there are a number of new cases in this area, which I have summarized below.

Supreme Court Rules that Obtaining Cell Site Location Information Is a Search

On Friday, the Supreme Court issued a long-awaited opinion in Carpenter v. United States. The Court held that when law enforcement obtains long-term cell site location information from a suspect’s service provider, it conducts a Fourth Amendment search that normally requires a warrant. Although the majority opinion states that it “is a narrow one,” the dissenting Justices and some scholars see it as a seismic shift that may have many aftershocks. I’ll summarize the case and then use former Secretary of Defense Donald Rumsfeld’s famous approach to address the “known knowns,” the “known unknowns,” and the “unknown unknowns” after Carpenter.

Pole Camera Surveillance Under the Fourth Amendment

Placing a video camera on a utility pole and conducting surveillance can be a useful law enforcement tool to gather information without requiring an in-person presence by officers at all times. But this tool may be subject to the Fourth Amendment restrictions. This post reviews the evolving case law, particularly since the United States Supreme Court ruling in United States v. Jones, 132 S. Ct. 945 (2012). Jeff Welty in a 2013 post reviewed video surveillance generally, not just pole cameras, and discussed Jones and the few cases decided in light of its ruling. This post, after reviewing Jones, will discuss a few pole camera cases decided in federal courts since his post and whether officers should seek approval from a court before conducting pole camera surveillance.

May an Officer Assume a False Identity Online in Order to “Friend” a Suspect?

Officers are allowed to misrepresent their identities in the course of their investigations: they may pose as drug buyers, or prostitutes, or members of an organized crime syndicate. Is the same thing true online? In other words, may an officer claim to be someone else in order to “friend” a suspect on social media and thereby gain access to whatever information the suspect has posted? The answer isn’t clear yet, but I would guess that courts ultimately will say yes.