Then covering up for sinners committing crimes makes you an accessory to the crime.
Instead of putting the entire Church at risk then, for the errant behavior of a single individual, doesn’t it make more sense to call the police and alert them to the criminal activity of the individual in question? That way, the criminal can be punished and the harm to the victims can be addressed. Is that not a duty and obligation in order to promote the common good?
At that time I told your judges: You must give your brothers a fair hearing and see justice done between a man and his brother or the stranger who lives with him. You must be impartial in judgement and give an equal hearing to small and great alike. Do not be afraid of any man, for the judgement is God’s. (Deuteronomy 1:16-17)