Informing the scholar of a specific person's disbelief and the limits of public interest in doing so

Question:
The questioner asks: Is it obligatory for a scholar, if he becomes aware that a specific person is a disbeliever, to inform people of this so that they may be wary of him? And what are the limits of public interest in this matter?

Answer:
If the one who has been ruled to be an apostate has a status among the people and the people are deceived by him, and he is calling to his school of thought, then he must be warned against and one should not remain silent about him. However, if his evil is confined to himself and he does not spread his evil, then he should be advised privately and left alone as long as his evil is confined to himself and there is no danger to the people from his evil. In this case, he should be advised, and the advice should be intensified with him, perhaps Allah will guide him, and this should remain a secret between him and the one advising him. Yes.