TV staffers' killing dubbed "first social media murder"

Gun homicides are not unusual in the United States, but what happened in Roanoke, Va., yesterday is rare — killings on live television that were then immediately posted on social media feeds.
The clips of on-air journalist Alison Parker and photographer Adam Ward being gunned down while on their station's morning show and filmed from two perspectives, including the killer's, went viral.
Some are calling it a turning point in the internet age: National Review writer Charles C. Cooke's online piece called it "America's first social media murder."  (CBC web page)
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