Trump said consequences "will have to be very severe" if the Saudis were found to be responsible for his death, but he also added that it was still "a little bit early" to draw a conclusion about who may have been behind Khashoggi's suspected murder.
"We will share them with the world when they become fully clear because the whole world, understandably, wants to know what happened to Khashoggi and how it happened".
Pompeo said he believes those combined efforts will produce "a complete picture" of what happened to Khashoggi, a Saudi journalist living in the USA who had been critical of the kingdom.
The sudden cash windfall raised some eyebrows on Wednesday, given the ongoing investigation into Khashoggi's disappearance, but U.S. officials denied that the swift transfer of cash between Saudi Arabia and the United States had anything to do with Pompeo's visit to Riyadh.
Amnesty International, Human Rights Watch, Reporters Without Borders and the Committee to Protect Journalists, said that a "one-sided" investigation by Saudi Arabia was not good enough. "I mean it's bad, bad stuff, but we'll see what happens".
Saudis 'to admit to killing journalist in interrogation that went wrong'
Trump had dispatched Pompeo to speak to the monarch of the world's top oil exporter over Khashoggi's disappearance. Saudi Arabia is reportedly ready to concede that a missing Saudi writer was killed in its consulate in Istanbul .
Pompeo emphasized the importance of a "thorough, transparent, and timely investigation that provides answers", the State Department said in a statement Tuesday.
At around 4:40 pm (1340 GMT) a team of a dozen police and prosecutors, including forensics experts in white overalls entered the residence of the consul, who was at the consulate when the alleged assassination of Khashoggi took place, according to Turkish media.
Khashoggi, who was often critical of the Saudi government in his reporting, disappeared after entering the Saudi Consulate in Istanbul on October 2.
A United States government source said that United States intelligence agencies are increasingly convinced of the crown prince's culpability in the operation against Khashoggi, which they believe resulted in his death. But one of the key figures in the Saudi-U.S. alliance is receiving particular scrutiny for his role, or lack thereof, in the response: Jared Kushner, the president's son-in-law. "I will not be going", he said.
While Saudi Arabia may never reap the consequences of its actions, the world should be wary of this nation.