A trial judge violates an accused person's constitutional right to a fair hearing under s 69(1) of the Constitution when he descends into the arena by questioning the accused in such a manner that, because of its frequency, length, timing, form, tone, or content, conveys or is likely to convey an impression of hostility, bias, or lack of impartiality. A judge must refrain from questioning witnesses or the accused in such a way that may preclude him from detachedly or objectively appreciating and adjudicating upon the issues, or in a way that may intimidate or disconcert the witness and affect credibility. The judge's impartiality must not only exist but must be seen to exist. Where a trial judge's conduct demonstrates he has prejudged the issues and deprived himself of the detached impartiality required, the fairness of the trial is undermined and the proceedings must be set aside as unconstitutional.