than i am right now. all indications point to saudi arabia arabia. if it turns out to be saudi arabia, as i said before, there will be all hell to pay. >> the white house resisting calls for action against saudi arabia. president trump thursday said the u.s. sent investigators to work with turkey. something turkish officials flatly deny. international diplomatic editor nic robertson is live for us. he's in istanbul with the latest. the pieces are starting to come together. what do we know about the evidence the turkish authorities have? >> reporter: we know that according to one western intelligence official who has seen it and viewed it that it is utterly shocking. the source we spoke to said that the turkish authorities shared this evidence with a number of allies. it showed clearly that jamal khashoggi was killed following a violent struggle and assault on him. the precise details we're not clear on, but what the sources