Where a trial judge has previously prosecuted the accused for a serious criminal offence, the prudent course will ordinarily be self-disqualification, but each case depends on its circumstances. The most significant factor is the lapse of time between the prior prosecution and the current trial. An 11½ year gap, combined with no independent recollection, unrelated offences, and proper conduct of the earlier prosecution, was held insufficient to ground a reasonable apprehension of bias.
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