trish: and we're back with professor alan dershowitz and i wanted to ask you about this associate of roger stone's, jerome corsey, now getting in the thick of it with mueller. where does this go? what do you think mueller has on him if anything? >> i don't think it goes anywhere. corsey is a conspiracy theorist. you can't use him as a witness. he would be devastated on the witness stand. maybe he can give you a document here or there or some information that you can then get you to lead to another witness but corsey himself can't be used as a witness even if he's corroborated, i don't think that manafort can be used as a witness. they're too tainted. these are admitted liars. trish: what is it they are trying to prove out here that somehow manafort -- >> knew in advance maybe about