Just a quick point - I'm assuming you've never been to Cambridge?Since all these weapons have been recovered, or not, I'm waiting to hear which one matches the bullet that killed the security officer at MIT. None have been matched so far. Days later. Nothing.
Why did they go to MIT again? Neither one of them attended school there. Were they even there?
Once you move away from the original campus quads, both the MIT and Harvard campus dissolve into the City of Cambridge and all of its businesses and residential areas. It's a very urban campus that sprawls well beyond the original campus boundaries. In fact, I was in Boston just this past weekend and was following an MIT campus police car on the Boston side of the Charles River. He or she was checking out a handful of brownstones and they all had MIT logos out front.
New member here by the way. I've really enjoyed reading these threads.