Not every irregularity, however, is fatal. To be fatal to the proceedings the irregularity must result in a failure of justice; There
will be no failure of justice if there is no prejudice to an accused, and there will be no prejudice to him if he would have been
convicted in any event, irrespective of the irregularity. Prejudice must, in principle, be proved. But there is this qualification:
if the irregularity impairs a facet of the proceedings which is fundamental to a proper administration of justice, the proceedings
as a whole are tainted; when, as a result there is a failure of proceedings as a whole, there is by the same token a failure of justice;
it would then be idle to speculate, in addition, on what, but for the irregularity, the fate of the accused would