And the judge even suggests as much - Uber could order him to testify (in the civil suit with Uber as defendant) or fire him if he refuses. But he continues working there today.

Though it is difficult to imagine what he is going to say to counteract the very strong impression of some cloak and dagger data theft. And even if against all odds he comes up with some believable story, it's not like Waymo need him to make their case. IIRC, the start of this whole case was some board manufacturing house sending Waymo an Uber design that looked very much like their own. So the moment they move into expert testimony on the similarity of the two product designs Uber is going to be royally screwed.