The guy is perfectly free to leave and join another church.
1 Corinthians 6:1-6Even if the guy that complained did the wrong thing by going to the police in this matter, one would think (or hope) that the pastor would be familiar with what the Bible says about how to deal with such problems. The civil courts aren't the right answer. A restraining order is not the right answer.
Does any one of you, when he has a case against his neighbor, dare to go to law before the unrighteous and not before the saints? Or do you not know that the saints will judge the world? If the world is judged by you, are you not competent to constitute the smallest law courts? Do you not know that we will judge angels? How much more matters of this life? So if you have law courts dealing with matters of this life, do you appoint them as judges who are of no account in the church? I say this to your shame. Is it so, that there is not among you one wise man who will be able to decide between his brethren, but brother goes to law with brother, and that before unbelievers?