To that point, how does this situation get fixed? Personally, this seems like a total failure of local governments. This should have been a relatively easy situation to mitigate (arrest the officer involved with the murder, even if just for show to calm folks down).
Now that it's spiraled, we're seeing signs of a police state which is very ominous. The question, though, is how calculated is this? My rational mind tells me that this level of force isn't something planned or trained for; just a reaction to the current events.
But it does set a precedent and as a country, we should be absolutely on guard and discussing this.