His own lawyers have abandoned him on these claims and he is now having to represent himself in the whistle blower case
This article from yesterday indicates that he has attorney representation https://www.google.com/url?sa=t&source=web&rct=j&url=https:/...
https://www.cnbc.com/2018/12/11/tesla-seeks-167-million-in-d...
It says nothing about his legal status, and if you believe the whistleblower he will be alright.