I'm  not familiar with the specifics of the trial procedures in Australia.  In the United States, the thinking is usually that the jury system favors the defendant in the sense that the defense needs to persuade only one juror of twelve.  However, it can be difficult to get a fair outcome if 'group think' sets in.  Pell's record as a diocesan bishop failing to supervise is not what he's on trial for, but it ought to be enough to prevent anyone from spinning him into a 'martyr.'  It ought to be, but it won't.