and pierre, paul manafort remains in prison, pending his sentencing. and you're learning new details that his health might be in serious condition here? >> reporter: that's right, david. his attorneys claim he's suffered from severe gout. and also suffering from depression and anxiety, david. >> pierre, thank you. >>> and that russian lawyer at the center of the trump tower meeting during the campaign, that's a focus of the mueller investigation, is now facing federal charges in a separate case. she's now charged with obstruction of justice, accused of attempting to block a u.s. investigation in the money laundering that involved an influential russian business maun. >>> there is word tonight that a u.s. navy veteran is being held prisoner in iran. the man's mother just learning the news back here in the u.s. after he failed to return home from a visit to iran in july. abc's chief global affairs correspondent with us live tonight. martha, do we know why iran may have taken him prisoner? >> reporter: david, tonight, there is no official explanation why