Wait wait wait wait wait...
Aren't all high caliber hand guns "cop killer"? Won't a .44 mag, casul, or the more recent .50 mag go right through a bullet proof vest? I have never heard of this gun before, what makes this so much more lethal then the ones I just mentioned?
There is no such thing as a bullet proof vest. The correct term for the NYC mayor is bullet resistant vest. LE does not walk around in body armor, which is bullet proof, to some extent.