According to the Inspector General Act of 1978 and updates in the Securing Inspector General's Act of 2022, there are steps that you have to take in order to remove an IG, because if there weren't, then the president or government official would have a really easy time covering up corruption.

The law says that the president has to tell Congress 30 days prior to the date of an intended termination of an inspector general, and they need to provide a thorough explanation with, quote, detailed and case specific reasons for the firing.