In Act III, Hale begins to gently plead on behalf of those presenting new evidence to the court. He becomes a counselor of sorts to the magistrates and begins to recommend that they should at least hear out what Proctor, Nurse and Corey have to say before dismissing them.
Hale seems to be the first to shift between trusting what the girls are say to trusting what the adults of the town are saying. It is difficult to discern who tells the truth when two parties stories are in conflict with each other. So in that regard, he is becoming a discerning judge who was never elected, but he is certainly playing that role for the reading audience.
Hale is also different from all others because he is not from this town. So, being an outsider, he had not previously taken sides on any of the issues the townspeople are having which each other and can make a fair judgement. Also, he is neither accused or accusing. Everyone else seems to be on one side or the other.