What is corroborative evidence in a sexual assault case?

However, it is settled law that corroborative evidence is evidence from some source other than the witness that confirms the witness’s testimony and tends to show that the witness is telling the truth: Vetrovec v. The Queen, 1982 CanLII 20 (SCC), [1982] 1 S.C.R. 811 at pp. 826-27, 829. As Dickson J. (as he then was) explained (at pp. 831-32) in his judgment for the court, “corroboration” is synonymous with “confirmation and support” and it should be sought in cases . . . where as a matter of common sense something in the nature of confirmatory evidence should be found before the finder of fact relies upon the evidence of a witness whose testimony occupies a central position in the purported demonstration of guilt and yet may be suspect by reason of the witness being an accomplice or complainant or of disreputable character.