Hope he has the funds
I suspect this will come down to how much money he has to fund his defense.
For sure there were others involved , who told the programers to make the changes etc etc.
Discovery is very expensive and you can bet Boeing is not going to do anything but obstruct.
The bill could easily run to hundreds of thousands.
Unless he has a very good insurance policy or a union somewhere , who has that kind of money?
Was a member of a union or ALPA while at Boeing?
So far the case against seems to consist of texts. A good lawyer can make those mean a lot of things.
What will count is the paper trail of documentation.
I suspect he will cut a deal and the truth will never be told.