Frankly, I think there is now “someone” she is “personally” consulting with on this case....and that she would like out because she knows there is no case against Zimmerman.
I also wonder if she thought that the audio stuff was so flaky that if the prosecution brought in their audio experts that the defense witnesses might destroy them through the defense witnesses testimony. It need not be oppositional (prosecution says it is the Right Reverend St Trayvon versus defense saying it is George Z. It may simply be that the prosecution says it is His Holiness St Trayvon versus defense saying "We cannot tell who it is - there is not enough there to tell with any certainty.) This second scenario might be more dangerous as the jury could decide the defense is right and the audio stuff goes out the window.
There really is no case against him, and everybody knows it.
The thing is that if she rules out these audio experts, I think she can also rule out the ones that supported Zimmerman. So who knows where this is going to go?