Sounds more like an Occupy Wall Street protest.
Via Breitbart:
On Monday evening, protesters in St. Louis who chaotically clashed with police over the shooting of an unarmed black resident jumped on a reporter’s car and threw a “blood-like substance” on the hood.
New York Times reporter Julie Bosman, who covers the region, said they apologized after realizing she “wasn’t police.” Confrontations between police and residents have intensified after Michael Brown, an unarmed black 18-year-old, was shot to death by a cop over the weekend. The FBI is now investigating the shooting.