As the video played in the Texas Capitol meeting room, the red target jerked back and forth across the map, tracing every movement that Malte Spitz, a German politician, had made during several months in 2009 — when he was riding a train, when he was at a nuclear protest, when he was in meetings or at a store, and when he was at home.
Who was tracking him? His cellphone.
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Mike Ward has covered criminal justice for the American-Statesman for more than two decades and has written about how technology and social media are changing the corrections and law enforcement landscape.