A few hours after a gunman walked up to a young TV reporter and her cameraman and shot them dead on live TV, a message appeared on Twitter. Short and unpunctuated, it read: "I filmed the shooting see Facebook"
The grim narrative that unfolded Wednesday was shocking to watch. Part gun-related workplace dispute and part racial hate crime — the gunman was African-American, the victims white — the horrifying shootings played out on live local TV, then on social media, then again on TV everywhere, as police pi...
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