Ah, the old leftist stalwart when faced with inconvenient facts - try to discredit the messenger. Sorry pal, no one cares anymore. The mainstream media is so blatantly leftist and biased that some balance is needed and you can't just dismiss things because your own biased news won't report reality.
Yes, stop-and-frisk has only recently been abolished - it appears to have had an affect on the crime rate though.
Another leftist trick is what you're doing by trying to lump all 'immigrants' in as one. The left do it with crime stats claiming that immigrants are more law abiding. They are, well, the lawful ones - they tend not to be the stabby-stabby ones. The illegal immigrants are criminal and are the ones who bring the high crime rates and total disrespect for the laws of the land.
It will take a few years for the problems to build up in a big city like NYC but if enough illegal immigrants go there then crime will rise just as surely as the sun rises in the east. The reason the rate suddenly jumps is that the leftist governed solution to this crime is to not count it while screaming nazi anytime a white person litters. At some point, they become unable to hide reality and the truth comes out. Then they will claim that people are being racist against the illegal immigrants committing it.