US police force probed on Stingray tracking technology

The American Civil Liberties Union (ACLU) is probing Florida police about its use of mobile phone tracking devices, after it emerged the state spent $3m on Stingrays.

Stingrays act as fake phone towers and allow the police to track suspects via their mobile signals.

The Florida state police said that it was not able to discuss its use of the technology.

Such a response was unacceptable, said the campaign group.

"We usually see this kind of response in the national security area; from a state police agency, it's particularly indefensible," said ACLU lawyer Nathan Wessler.

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