The Government Can No Longer Track Your Cell Phone Without a Warrant | Motherboard - 0 views
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The government and police regularly use location data pulled off of cell phone towers to put criminals at the scenes of crimes—often without a warrant. Well, an appeals court ruled today that the practice is unconstitutional, in one of the strongest judicial defenses of technology privacy rights we've seen in a while. The United States Court of Appeals for the Eleventh Circuit ruled that the government illegally obtained and used Quartavious Davis's cell phone location data to help convict him in a string of armed robberies in Miami and unequivocally stated that cell phone location information is protected by the Fourth Amendment. "In short, we hold that cell site location information is within the subscriber’s reasonable expectation of privacy," the court ruled in an opinion written by Judge David Sentelle. "The obtaining of that data without a warrant is a Fourth Amendment violation."
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In Davis's case, police used his cell phone's call history against him to put him at the scene of several armed robberies. They obtained a court order—which does not require the government to show probable cause—not a warrant, to do so. From now on, that'll be illegal. The decision applies only in the Eleventh Circuit, but sets a strong precedent for future cases.
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Indeed, the decision alone is a huge privacy win, but Sentelle's strong language supporting cell phone users' privacy rights is perhaps the most important part of the opinion. Sentelle pushed back against several of the federal government's arguments, including one that suggested that, because cell phone location data based on a caller's closest cell tower isn't precise, it should be readily collectable. "The United States further argues that cell site location information is less protected than GPS data because it is less precise. We are not sure why this should be significant. We do not doubt that there may be a difference in precision, but that is not to say that the difference in precision has constitutional significance," Sentelle wrote. "That information obtained by an invasion of privacy may not be entirely precise does not change the calculus as to whether obtaining it was in fact an invasion of privacy." The court also cited the infamous US v. Jones Supreme Court decision that held that attaching a GPS to a suspect's car is a "search" under the Fourth Amendment. Sentelle suggested a cell phone user has an even greater expectation of location privacy with his or her cell phone use than a driver does with his or her car. A car, Sentelle wrote, isn't always with a person, while a cell phone, these days, usually is.
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Another victory for civil libertarians against the surveillance state. Note that this is another decision drawing guidance from the Supreme Court's decision in U.S. v. Jones, shortly before the Edward Snowden leaks came to light, that called for re-examination of the Third Party Doctrine, an older doctrine that data given to or generated by third parties is not protected by the Fourth Amendment.
