Murders in US very concentrated: 54% of US counties in 2014 had zero murders, 2% of counties have 51% of the murders - Crime Prevention Research Center
there is always two ways to view things, or 2 sides of the story!
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so from your figures, 46% of all counties have murders
2% of that 46% of all counties, have 51% of all murders committed there...
and the remaining 44% of all the counties in the USA have 49% of all murders committed in the USA....
so nearly have the counties in the USA, do have murders taking place....and a lot of them!