The US Supreme Court has ruled in favor of a defendant challenging the government’s use of his cellphone location information without a warrant.
Timothy Carpenter was sentenced to 116 years in prison after being found guilty in 2013 of planning a number of armed robberies across the American Midwest. Police used his cellphone records to link him to the crimes but Carpenter argued at his trial that the records were inadmissible as they had been obtained without a legal writ.
His argument was rejected by the initial trial court and at the court of appeal, before the case was brought before the Supreme Court in November 2017. Carpenter was represented in the case by the American Civil Liberties Union (ACLU).
The court ruled 5-4 in favor of Carpenter, saying that police need a court-approved warrant to access a citizen’s private data. Taking data from service providers without a warrant amounts to unreasonable search and seizure under the Fourth Amendment in the US Constitution, the court said.
In a statement posted to Twitter, the ACLU called the case “a groundbreaking victory for Americans’ privacy rights.”
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