"ACTIVITY AT 2100 MUST CREDIT  Twitter on Tuesday released an animated heat map of the U.S. showing geo-tagged Twitter mentions of ""Ferguson"" or ""#Ferguson"" from 6-11 p.m. local time. A separate Twitter Data post showed figures spiked at around 52,200 tweets per minute around 8:30 p.m. CT, when St. Louis County Prosecutor Bob McCullough announced that a grand jury found ""no probable cause exists"" to indict Officer Darren Wilson."
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