Re: Follow the money
If being fired caused him to lose some unvested dollars, you can expect a lawsuit soon claiming he was terminated to prevent him from fully vesting.
No,
He wouldn't have a case.
The issue is that he was ordered to comply, which he has refused to do so. So its now a well documented case. Were he to comply, he'd be open to a lot more litigation as an individual so he was smart to plead the 5th.
Did you read about the clause that lets him back in to Uber if he decides to cooperate?
Suppose he does... then if he admits he stole the data... Uber will still be able to fire him.
Lucky for him, he probably has a bit of money in the bank so he can sit tight until this blows over and he moves on to somewhere else.
So Uber dodges a bullet by letting him go and they still take a slight loss.
If Google still goes after him, they (Uber) could probably claw back some of the money they spent on the company that was already vested. They may also just let it drop and move on.