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How Big Tech created a data ‘treasure trove’ for police

FILE - In this Oct. 29, 2019 file photo, a screen displays a notice on an iPhone in New York. When U.S. law enforcement officials are fishing for information, they increasingly know where to go -- in the vast digital ponds of personal data that Big Tech companies have created in their devices and online services that have hooked billions of people around the world. (AP Photo/Jenny Kane)