The omniscient point of view is when the narrator is able to know everything, the thoughts and the feelings of all the characters, also can describe all the situations and the perspective is objective, taking this into account the omniscient point of view is shows clearly when The reader can follow the thoughts and feelings of both Lizzie and Turner.
Elizabeth tells the court that John never had an affair with Abigail. She does this to try to help him but it actually just wrecks his entire testimony.