Carol Costello is some kind of talking head at CNN. The open glee she exhibits to a tape of a women being beaten up that she plays for the audience has to be seen to be believed.
Watch the video embedded in this link to see what I mean.
Carol Costello thinks she is demonstrating moral superiority. She is really demonstrating her own moral depravity. I rarely use the term evil to describe political enemies (unless they are foreign dictators like Vladimir Putin or Pol Pot), but the use of that adjective here is entirely justified:
Carol Costello is evil.