So, he lied to regulators, persuaded airlines to remove training on MCAS and bragged about it. (knowing it would activate in extreme circumstances)
After he found that boeing had changed the design and made mcas work more often. He did not raise any alarm bells and just kept quiet...
He deserves the trial... He did have at least an ethical obligation of saying "hei guys, I was wrong, design changed, please re-evaluate" even if it meant getting fired.
Also, the fact that Boeing can change design without guarantees that FAA and customers are informed is a bigger problem...