An individual has a reasonable expectation of privacy in records about his cell phone’s location, and police intrude on that constitutionally protected interest when they demand the information — even though for only a limited time, and from a third-party tech company.
Majority opinion on cellphone location data privacy.
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More from Elena Kagan
I first joined the court in 2010. Our security was very different at the time.
If we want gun manufacturers to pay for gun violence abroad, we need to tell members of Congress to write a different law.
The police conducted a search when they gained access to Location History data.
I do not see how a district court can compel compliance with an order that this court has stayed.