First google result contains it:

  "But we also have to have an organized effort against 
  gangs," Hillary Clinton  said in a C-SPAN video clip. 
  "Just as in a previous generation we had an organized 
  effort against the mob. We need to take these people 
  on. They are often connected to big drug cartels, they 
  are not just gangs of kids anymore. They are often the 
  kinds of kids that are called superpredators — no 
  conscience, no empathy. We can talk about why they 
  ended up that way, but first, we have to bring them to 
  heel."

So, no, it's a twisting of words. But not limited to the Trump campaign. Trump didn't call all Mexicans rapists, either.