Doesn’t seem like this case would be ending today if GZ will testify. So 99% sure he won’t.
I know the risks but GZ has been so independent a bit surprised he didn’t want to testify to make his own case. He certainly did that well on the taped interviews. Of course, at that point he actually had faith in the system and knew he was acting in self defense.
If you hire an attorney, listen to them! MOM has this in the bag.