That is definately implied. But was it a sympathetic sigh, a sign to Dusek that he made his point and they agreed that Hall was being uncooperative or was the sigh one of disgust, they felt Dusek was wasting their time. I have learned, that especially of it comes from a female, never assume what a sigh means.
Further, I listened to Dusek. He doesn't seem to be aware of how others are perceiving him. He gets too focused on his objective and seems to have a low frustration level. I think he is too dense to end his line of questioning because of how the jury was perceiving him. If he did then he should have gotten signals way before that. But his voice might not match his body language, I would have to see him to be sure.