"Section 597B of the Criminal Code (Qld) confers a discretion on the trial judge, at any time during the trial of two or more persons, as here, charged in the same indictment, that the persons charged be tried separately. The events leading up to the murder and dismemberment of the infant, and the guilt or innocence of the appellant and the co-accused, were closely interconnected. Their relationship, their similar motives, their almost equal opportunity to commit the crimes, and their capacity, either separately or jointly to commit them, all argued very strongly in favour of a joint trial. There were no special or other features of the case requiring that they be tried separately. That one might seek to incriminate the other, as each accused here did, could provide no justification for a direction that the appellant and his co-accused be tried separately.[9] A joint trial of the appellant and the co-accused served to give the jury the means of obtaining a conspectus of the respective roles of each of them in the crimes with which they were charged." (emphasis added)