From Capt Gomes (in the article)...
"..these things don't have any place in an urban environment..."
I don't recall the Constitution putting any restrictions on the RTKBA based on geographic setting!
BTW, notice how the whole article was about the type of guns carried during crimes, with ZERO discussion about the crimes themselves or what factors lead to the crimes. Typical diversion action.
So the problem isn't the explosion of crime in Menino's city, on his watch, it's the type of weapon brought in from elsewhere.
Now, back to discussion of the availability of a 9mm Sub2000.