Where a prosecution case depends wholly on the evidence of an indemnified witness under s 13A of the Penalties and Sentences Act 1992 (Qld), a conviction may be upheld on appeal as not unreasonable if there is independent circumstantial evidence capable of providing a basis for the jury to accept the witness's account on the specific charge, even where the witness has demonstrably lied on multiple occasions and the evidence was obtained through police inducements specifically targeting the accused. The adequacy of judicial warnings to the jury about scrutinising such evidence is a significant factor in the appellate assessment.
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