The ex-Victoria's Secret angel hit the streets in NYC in the high-caliber, low-taste outfit -- seemingly oblivious to the fact police had a deadly gun battle last night with the Boston Marathon bombing suspects ... and hundreds of officers continue to hunt for Dzhokhar Tsarnaev.
Either Karolina's been under a rock ... or she just doesn't give a crap.
And they say models are vapid bubbleheads.
