When you can draw arbitrary borders, you can make the numbers mean whatever you want.
https://en.wikipedia.org/wiki/List_of_United_States_cities_b...
And you'll see that Washington D.C. doesn't make the top ten for rates of any of the major violent crimes (murder, rape, etc.) nor for the "Total" violent crime.
When you can draw arbitrary borders, you can make the numbers mean whatever you want.