he is under here as the special counsel's investigation continues. >> roger stone was part of the trump campaign. he then lost that role or has remained as sort of unofficial close advisor or supporter of trump continually. he had some interactions with wikileaks and he also posted something that suggested that he may have known ahead of time that something was coming about podesta's e-mails. so he's been under intense scrutiny as part of what is now the mueller investigation. he's suggested that maybe he might even be indicted over something, though he says that that might be unrelated to russian collusion. he is a long-standing political operative, sort of notorious for his gleeful embrace of the dirty tricks side of politics, going back many, many, many years. a very colorful character in american politics. and now his story may be reaching a climax. >> charlie savage, washington correspondent for "the new york times" and barbara mcquaid from the university of michigan law