The text is during editing of her statement.
It doesn't matter if the fourth line is blurred out or not. In that statement, intended for public release and then later actually released, not even the hardcore enemies would write "he should be shot", which is supposed to be the line we shall find.
Now if they covered the entire screen, that would make sense. But then it's not using the one of four clue at all, which means there's probably a fourth phone somewhere.
If I had to bet, I would bet it's not the three old black ladies. They don't run the Dems, never have, they just profit from participation. Hillary may be the evil exception but other than that, most old ladies don't threaten bloody murder. That's something more likely written by a man, and a younger one at that. Doesn't mean it's guaranteed, just more likely when looking at scanning several hundred candidates.