A former Director of Public Prosecutions appointed to the bench is not necessarily disqualified from hearing all proceedings involving persons they prosecuted or opposed, but where the DPP was identified as the principal adversary in post-conviction inquiries and there is a risk that submissions addressed the litigant's credibility, a real doubt may arise warranting recusal. Robust but professionally proper submissions made as counsel do not, without more, disqualify a subsequently appointed judge. Discontinuance and re-commencement of proceedings to avoid a particular judge may constitute an abuse of process.
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