I wouldn't answer in his position either. If there's any internal record that he wasn't sure (and how could he be before the trial's over), and if he mentioned

I wouldn't answer in his position either. If there's any internal record that he wasn't sure (and how could he be before the trial's over), and if he mentioned it to anyone who isn't a lawyer (no attorney-client privilege), then a definite answer either way invites a perjury charge.