The applicant, the Prime Minister of Canada, sought to quash a subpoena compelling him to testify at the criminal trial of the respondent, who was charged with assault with a weapon for throwing gravel at the applicant during a campaign event.
The court quashed the subpoena on three independent grounds: the respondent failed to show the applicant was likely to give material and necessary evidence; the subpoena was an abuse of process intended for political purposes rather than legal ones; and the applicant enjoyed absolute parliamentary privilege providing testimonial immunity while Parliament is in session.
