the OP did not provide his data source, but it was posted in 2019. The trend is at least on-par with any other map of similar crime statistics.

Point being: crime is fairly diffuse throughout the US, and there are no counties that experience "0/100k" homicide rates.

edit: here is the post in question. feel free to reach out to them.

https://www.reddit.com/r/MapPorn/comments/er763t/homicide_rate_by_county/

>since crime in the US is highly concentrated into very specific geographical areas.

No, that is a false claim. High Crime rate per capita is not limited to only 5% of counties.

Here is a map of homicide rate by US county made by a fellow redditor.