Assuming this nut job was indeed a member of the 'Occupy' Black Bloc. I doubt they'll bother looking very deeply into it. And even if they do, they'd no doubt look for some way to dismiss or 'rationalize' it. They did this with the Weather Underground. ie, "they were noble sorts who perhaps went a bit too far trying to end an unjust war, blah, blah, blah"
Somebody needs to start asking the media what "Black Bloc" is. Repeatedly.
Excuse me. It's past high time to exit their fantasyland and demand they acknowledge reality.