A judge determining a permanent stay application based on the unavailability of evidence is entitled, if not bound, to analyse the credibility and reliability of the unavailable evidence in order to assess the extent of prejudice to the defence. The principles in Sio v The Queen (concerning the statutory construction of s 65(2)(d) of the Evidence Act) and IMM v The Queen (concerning the assessment of probative value under ss 97 and 137) do not govern the assessment of unavailable evidence in the context of a permanent stay application. An interlocutory appeal is an appeal in the strict sense, and an applicant is not at liberty to advance a different case from that argued below.
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