A curfew rigorously enforced would solve this particular situation, and finding out how such a policy must certainly have been rejected, probably several time, would be enlightening, although we can easily guess how that played out.
It's an urban disease liberals, particularly white liberals as well as the programmed and other "reduced" citizens of our nation won't discuss; federally-subsidized illegitimacy, dependency, etc., etc. The true-believing progressives prefer, of course, to instead concentrate their analysis upon only good intentions, that being all that matters to a disabled conscience.
Stick a fork in Baltimore, at least for a couple generations, because, like Detroit, it's done.
In Baltimore, even the “safe areas” such as Little Italy and the Inner Harbor area are no longer safe from the roving “yutes”.