Once a voir dire is conducted, the rules are fairly clear. As long ago as the decision of Rex v. Thiffault (1933), 1933 CanLII 52 (SCC), S.C.R. 509, all persons in authority who were present at the time the statement was taken, must either be called to give evidence or at least be available for cross-examination. There have been a line of cases since then that the failure to account for the absence of one of those police officers may well preclude the admissibility of that particular confession.
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