It's not just about law enforcement.
Two nights of violence this week in Charlotte, North Carolina, have been blamed on anger and frustration over the shooting death of a 43-year-old African-American man by police.
But the widespread social unrest in Charlotte, as in other cities, also stems from ongoing economic inequality along racial lines.
The streets were mostly quiet Thursday, after a peaceful prayer vigil Wednesday night turned into an angry march and then a night of violence in the city's normally vibrant downtown. Bank of America, Wells Fargo and Duke Energy all told employees not to venture into North Carolina's largest city after Gov. Pat McCrory declared a state of emergency Wednesday night and called in the National Guard.
The Justice Department also sent a community relations team to the city to help work to resolve the conflict.
Protesters continued to seek a fuller explanation for what happened to Keith Lamont Scott, who police said refused officers' repeated commands to drop a gun. Residents say Scott was unarmed, holding only a book and disabled by a brain injury.
The unrest took many by surprise in Charlotte, a prosperous banking capital of the South with a population of 830,000 people, about a third of whom are black. The city is also a popular destination for tourists and conventions.
The thriving local economy has helped Charlotte achieve one of the fastest growth rates among large U.S. metro areas, more than double the national average.