Rumor mills churned out one of their most childish pieces of fake news that investigators were looking for Khashoggi's black Apple Watch with reported recordings.
There is no evidence he left afterward, leading Turkish officials to say they believe he was killed.
Saudi authorities have yet to give a clear explanation of Khashoggi's fate, while several countries - particularly Turkey, the US, and the U.K - are pressing the case to be cleared up as soon as possible.
A delegation from Saudi Arabia has arrived in Turkey as part of a joint investigation. "It felt very insensitive and it's something that we shouldn't really be getting involved with, so we thought we're going to stay away from that". "We are following the situation closely, and unless a substantially different set of facts emerges, I won't be attending the FII conference in Riyadh", Khosrowshahi said in a statement to CBS MoneyWatch.
Trump signaled that cutting off US military sales to the kingdom may not be an option, saying, "I don't want to hurt jobs".
Speaking to reporters at the White House on Saturday, he added: "There are other things we can do that are very, very powerful, very strong and we'll do them".
"He said, 'See you later my darling, ' and went in", she told the AP.
Other company leaders who've said they will not attend the summit because of the Khashoggi case include Viacom Inc.
CCTV VIA HURRIYET / ASSOCIATED PRESS A surveillance video obtained by the Turkish newspaper Hurriyet and made available on October 9 shows a man believed to be Khashoggi entering the Saudi Consulate in Istanbul on October 2.
But the row has intensified with the Washington Post reporting that Turkish officials have recordings made from inside the building that allegedly prove their claims Khashoggi was tortured and killed at the consulate. And we would be very upset and angry if that were the case. "If more information comes out and changes, we could look at that, but I am planning on going".
The kingdom has said it had nothing to do with Mr Khashoggi's disappearance.
So who in Saudi Arabia could be singled out for punishment under a 2016 global version of the Act - apart from the 15-man hit squad and the consul-general in Istanbul, Mohammad al-Otaiba, whose back garden is now a place of interest in the investigation?