He doesn't have to. I'm certain that he has the fortitude to speak for himself.
I'm sure KH has a great deal of fortitude, but he also has a lawyer whom he is paying to speak for him and/or supply experts. I'm sure he, like Terri, will take the advice of his attorney. We've seen the results here on this board to those who don't listen. Misty comes to mind, but there's many another.