Depending on how much he currently has wealth-wise, his reputation and credibility here might be worth much more than that in the long run.
He's still a bright engineer who could go on to do things in the self-driving car space. His expertise and exposure to the most cutting-edge IP is worth quite a bit. The less damage he gets out of this legally and the less dirt thrown on his name the more he will be able to turn that into real long term monetary value.
Not to mention the social costs.
If I was him I'd also being doing as much as possible to minimize the negative outcome of these legal proceedings for all who were involved with him.
I'd rather have, say, $20M plus a reasonable shot at making a lot of money in the future with a marginal reputation than risk my name being run through the dirt for a chance at $250M. Many smart people who had a shaky past have gone on to be successful. Talent/having the right skillset at the right time seems to trump (no pun intended) bad press ... in America especially.