Already happened in Detroit, Louisville, and Miami(? a Florida city) -- nothing much happened. Early on, there was an elevated rate of crime, but once police started showing up it kinda fell apart. Everyone stayed in doors, police patrolled. This one will probably be the same.
Good luck Missouri! I think that's one of those states where the gun slinging idiots like to complain about minorities. Would not be surprised (hopefully not ) if someone gets seriously injured or worse