How cops can prepare for riots

As we have recently seen in Charlotte (N.C.), a city can be torn apart overnight by looting, arson, and violence if a peaceful protest devolves into rioting and mayhem. Even in cities where police-community relations are good, there are often outside agitators who suddenly appear in town to cause chaos. Doug and Jim discuss how police leaders can prepare for the worst, which could be just one controversial incident away at any moment.