The right of an accused to cross-examine prosecution witnesses without significant and unwarranted constraint is an essential component of the right to make a full answer and defence. The right of cross-examination is protected by section 7 and subsection 11(d) of the Charter and must be jealously protected and broadly construed. A question can be put to a witness in cross-examination regarding matters that need not be proved independently, provided that counsel has a good faith basis for putting the question. It is not uncommon for counsel to believe in a state of affairs based on information received from his client or others, without having specific proof by way of evidence. As long as counsel has a good faith basis to believe in that particular state of affairs, cross-examination based upon the belief is appropriate.
A “good faith” basis is a function of the information available to the cross-examiner, his or her belief in its likely accuracy, and the purpose for which it is used. The information may fall short of admissible evidence and may be incomplete or uncertain, provided the cross-examiner does not put suggestions to the witness recklessly or that he or she knows to be false. The cross-examiner may pursue any hypothesis that is honestly advanced on the strength of a reasonable inference, experience or intuition, and, there is no requirement of an evidentiary foundation for every factual suggestion put to a witness in cross-examination.
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