Tbh I absolutely think it is more probable that this is another unjust firing of a government official. I have only seen public appearances but Inman seemed like an honorable man. I believe he will be suing.
Obviously I am biased, as I am a huge NTSB fan. One of the few government agencies left that I can take pride in.

https://apnews.com/article/ntsb-white-house-inman-fired-trump-ef22e76ba13aae6eacbbef7ed01ecadd

The White House says it fired an NTSB board member for serious misconduct, and he says the claims are false.

#NTSB