Some of the cop-killer myth came out of mexico when the cartel happend to get a boat load of the ps-90's and distributed them to even lower level criminals int heir enterprise. The cops there are used to low levels touting .380's so it was quite a substantial increase for them to be combatting larger magazines and a round that even has an AP load. La policia muerte was the colloquial name given and it found mythos in the United States and has continued to be over-exaggerated. This is what I got from my work when I emailed them about the history ont this because I knew it had come up before on the floor of the House, the Republicans responded to the dems with this bit of information which was actually well researched history, If I get home and can find somewhere on the web this is cited I'll give it to you guys.
