Similar Fact Evidence: Unintentional Collusion
In similar fact evidence cases, at the admissibility stage, the trial judge’s main task is to weigh the probative value of the evidence against its potential prejudicial effect. The possibility of collusion may significantly affect this balancing.See R. v. Wilkinson, 2017 ONCA 756 (CanLII), at para. 29. The theory of similar fact evidence turns largely on the improbability of coincidence. Collusion, by offering an alternative explanation for the "coincidence" of evidence emanating from different witnesses, destroys its probative value, and therefore the basis for its admissibility. R. v. Shearing, 2002 SCC 58 (CanLII),Shearing, at para. 40. Accused to Establish an Air of Reality to the Allegation of Collusion The dividing line between cases in which collusion is a live issue, and cases in which it is not, is the presence of an “air of reality.” As Binnie J. held in Handy,2002 SCC 56 (CanLII), at para. 111: “The issue is concoction or collaboration, not contact. If the evidence amounts to no more than opportunity, it will usually best be left to the jury.” Crown must then disprove collusion on balance Although collusion is a feature of probative value, it is singled out for special consideration at the admissibility stage. The Crown must disprove the possibility of collusion. Where, there is some evidence of actual collusion, or at least an "air of reality" to the allegations, the Crown is required to satisfy the trial judge, on a balance of probabilities, that the evidence of similar facts is not tainted with collusion. That much would gain admission. Handy, at para. 112. If this threshold test is passed, the jury must determine for itself what weight, if any, to assign to the similar fact evidence. Shearing, at para. 42. Inadvertent Collusion Collusion may