Supreme Court puts Big Brother on trial — and your privacy on the line

“Big Brother is watching you” is no longer a fictional admonition. Your location is recorded wherever you go — by phone technology, license plate readers, Uber transactions and cameras everywhere. That puts evidence of your personal movements in the hands of tech companies that you may never even have heard of. Can the police and other government agencies force those companies to share that information? That was the question before the US Supreme Court this week, in a case that could impact your privacy. If your location history puts you in the vicinity of a crime, for example, you may...