Mexican gangs operate in Atlanta, and many other big cities.
Mostly illegals, and mostly involved with drugs.
In California they are one of the biggest growers of marijuana, and the most violent.
It's not spilled over the border, our smarmy politicians have as much as invited them.
The murder rate in this country would go down dramatically if the border was recognized for the purpose it exists.
Only in certain places. The high murder rates in Detroit, New Orleans, and Chicago have next to nothing to do with illegals.