"Any man whom Allah has given the authority of ruling some people and he does not look after them in an honest manner, will never feel even the smell of Paradise." - Prophet Muhammad (PBUH).
People fighting corruption this way not only risk their livelihoods but also their lives. So it won’t be out of place for the country to give him some kind of social protection for such an exemplary act. After all is said and done and he is proved true, the whistle-blower’s reward would also be a good idea, in addition to whatever else may follow.