During a lengthy criminal trial involving charges arising from a fatal motor vehicle collision, the Crown sought to call an additional accident reconstruction expert after the trial had already commenced and after the Crown’s primary reconstruction witness had testified.
The defence objected, arguing that the late disclosure of the expert report caused significant prejudice and that the court should exclude the evidence in the interests of trial fairness.
The court considered s. 657.3 of the Criminal Code and authorities addressing remedies for late expert disclosure.
It held that exclusion of relevant evidence is an exceptional remedy and that the prejudice to the accused could be addressed through a brief adjournment allowing the defence to consult its own expert.
The court therefore permitted the Crown to call the additional expert subject to an adjournment for the defence.