Officials familiar with the case cautioned that while it's likely the crown prince was involved in the death, there continue to be questions about what role he played.
Trump has said the Saudi government has tried to cover up the killing and "the cover-up was one of the worst cover-ups in the history of cover-ups". The resulting worldwide uproar has called into question Saudi Arabia's investments around the world.
"You saw we put on very heavy sanctions, massive sanctions on a large group of people from Saudi Arabia".
In his remarks, the president spoke of Saudi Arabia as "a truly spectacular ally in terms of jobs and economic development".
Despite reports that the final conclusion would blame Saudi Crown Prince Mohammed bin Salman (known as MBS), a Hollywood and major tech investor, the State Department issued a statement downplaying that news. He says the USA will need to be clear about the ramifications of sanctions, given Saudi Arabia's strategic role in the Middle East.
Trump has repeatedly made it clear that he doesn't want to see the Khashoggi murder threaten USA arms sales to the Saudis. "The State Department will continue to seek all relevant facts".
Saudi Arabia has offered shifting accounts of what happened, initially saying Khashoggi left the embassy after receiving his documents and later that he was killed when an argument degenerated into a fistfight.
The Washington Post, which broke the CIA story, said the agency found that 15 Saudi agents flew on government aircraft to Istanbul and assassinated Khashoggi in the Saudi consulate. Sources told the Post that Khalid made the call at his brother's command.
Khashoggi death: Saudi govt issues charges but exonerate crown prince
Khalid bin Salman denied the allegation via Twitter soon after the Post published its article. I ask the USA government to release any information regarding this claim, " he said.
"The last contact I had with Mr. Khashoggi was via text on October 26, 2017".
Meanwhile, Turkey's defense minister said Khashoggi's killers may have taken his dismembered body out of Turkey in luggage after he was murdered.
The location of Khashoggi's remains remain unknown.
The State Department had sanctioned 17 individuals on Thursday last week and the Saudi Public Prosecutor's Office had said, on the same day, that it was indicting 11 people for the murder and seeking the death penalty for five of these.
The death of a Saudi journalist is the subject of an upcoming government report, and that's presenting President Donald Trump with a diplomatic dilemma.
Trump told Wallace in the interview conducted November 16 that the prince had told him he had nothing to do with the killing "maybe five times at different points", including "as recently as a few days ago".
After initially denying any knowledge of Khashoggi's whereabouts, Riyadh admitted later in October that the journalist had been killed in a fight inside the consulate.