Dear EyeGuy,
First, the report says, "gang-style," not "gang-related."
Second, from what I've read, St. Louis is a predominantly black city. Anne Arundel County, Maryland, isn't.
I grew up in adjacent Prince George's County, MD, during a period when the schools were desegregated through forced busing, and the county when from being majority white to majority black.
I can tell you that in the year and a half I spent in public schools after busing started, I saw plenty of white gangs, and saw my fair share of violence between gangs, usually between clashing white and black gangs.
I know that there have been racial tensions at least from time to time in some of Anne Arundel County's schools. I wouldn't be surprised by a clash between whites and blacks, and I wouldn't be surprised if a white guy [or a black guy, or both] brought a gun to the fight. I've personally seen both.
sitetest
Well, as I said, perhaps things are different in Maryland.
As far as St. Louis, only part of the CITY of St. Louis is predominately black, and is virulently dangerous (see latest chart-topping FBI crime statistics). The rest of the city and the much larger suburban area is famously peaceful and family-oriented.
We haven't had white gangs in this metroplex since Prohibition.