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I think yes, under the condition that it is proven and not a calumny. It must be proven, and the bishop must conduct an investigation. When it is truly proven, and he is found guilty, he must be removed. It is a scandal and a bad example. He must also be punished and do penance for his own soul, to save his soul, to weep for his sins, to have contrition, and to make reparation for the scandal he has caused to that person and to others.
Follow-up Question: Should he remain as pastor until it is proven, or should he be assigned to another place while the matter is being examined?
It must be decided by the bishop. When it is not proven, I think he can remain, since it is not yet proven. But as soon as it is proven, action must be taken. I cannot speak in a general way, because situations differ. The bishop must immediately investigate and clarify the matter. Even when there are already sufficient signs of guilt before a final decision, it is better that he be temporarily removed or transferred to another parish, because the rumors already exist and there is no longer trust, even if he were to be innocent.