Here's the background with video, "NBC's David Gregory Under Investigation by Washington, D.C., Metropolitan Police."
And here's William Jacobson, "D.C. Police — NBC requested and was denied permission to use high capacity magazine in news segment." (Via Memeorandum, where just a whole lot more bloggers are also reporting.)
Laws are for little people, I guess. But I wonder, is that really a "planned vacation" for Gregory next Sunday? He won't be hosting "Meet the Press." Arrest the f-ker, I say. He and his producers should be prosecuted.