In R. v. Nnane (Ont CA, 2025) the Ontario Court of Appeal considers the sensible limitations of judicial immunity, here where the issue was the CCC 683 appeal admission of former counsel's (now judge) affidavit cross-examination:
[9] This is not a case involving judicial immunity. The Crown does not seek to cross-examine Justice Derstine in relation to acts taken within his judicial role. That would clearly be off-limits, and no one suggests otherwise: see MacKeigan v. Hickman, 1989 CanLII 40 (SCC), [1989] 2 S.C.R. 796, at pp. 828-33; R. v. Swaine, 2025 ONCA 614, at paras. 8-9. ....
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