Experts can be bought regardless of reputations.
So you are saying that the bug guy has been bought? Any proof? Would it be just as fair for me to say that Barb, Denise and the other members of the "Pizza Party" wer bought also? No it wouldn't, as I have no proof of this - isn't that what this trial is about? Proof and evidence? or is it about rumors, accusations and lying under oath?