The IRS attempted to identify and track potential criminal suspects by buying access to a marketing database of location data for millions of US cellphones (Byron Tau/Wall Street Journal)

Byron Tau / Wall Street Journal:
The IRS attempted to identify and track potential criminal suspects by buying access to a marketing database of location data for millions of US cellphones  —  The unsuccessful effort shows how anonymized information sold by marketers is increasingly being used by law enforcement to identify suspects

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