If you step outside of the major US cities, the murder rate per capita plunges. That variance in the US is far beyond what you see in other developed nations (eg Britain, Sweden, Finland, France, Belgium, Germany, Japan, etc). It's so bad that if you just brought the three dozen worst urban sub-areas down to normal as compared to the rest of the city in question, you'd reduce the total US murder rate more than a full point.
>if you just brought the three dozen worst urban sub-areas down to normal as compared to the rest of the city in question, you'd reduce the total US murder rate more than a full point
>three-dozen
That seems like a lot of areas to say "just". If it's that easy to bring it down, do it in actuality rather than coming up with hypothetical scenarios where the US doesn't have such a high murder rate.