"He's running things and so if anybody were going to be, it would be him", the president responded.
Issuing a statement condemning the journalist's assassination, the Sri Lankan media watchdog stated that the Saudi government should extend its fullest cooperation towards global efforts to investigate the murder.
Gary Grappo, a former United States ambassador to Oman and deputy chief of mission in Riyadh, said bin Salman had solidified power to a level where he is unlikely to be removed - but that Western powers would be increasingly wary of him after Khashoggi's death.
Saudi-led airstrikes have struck medical clinics and markets, killing large numbers of civilians and damaging vital infrastructure.
France has been relatively guarded so far in reacting to Khashoggi's death at the Saudi consulate in Istanbul given its close diplomatic ties with Riyadh and commercial relations spanning energy, finance and arms.
While defending arms sales to Saudi Arabia on business grounds, Trump said: "Don't forget, if it wasn't for us, it could very well be that Saudi Arabia wouldn't last very long".
Many EU nations are debating a halt to arms exports but there has been no clear push for an embargo.
Detienen a ladrones de la manera más tonta — Insólito
No obstante, nuevamente sucedería lo inesperado cuando los hampones volvieron a las 5:30 p.m., una hora antes de lo acordado. Didier conversó con ellos amistosamente y logró convencerlos de que regresaran más tarde .
Turkish police gather outside the residence of the Saudi consul General Mohammed al-Otaibi to conduct a search after the disappearance and alleged slaying of writer Jamal Khashoggi, in Istanbul, Oct. 17, 2018.
The prince's olive branch to Turkey appeared to dial back an escalation in rhetoric on Tuesday, when Erdogan made a speech timed to coincide with the opening of the conference in which he said the killing of 59-year-old Khashoggi was premeditated and the culprits should be punished even if they were senior officials.
Meanwhile, the crown prince has attended the first meeting of a committee aiming to restructure the kingdom's intelligence services after the killing of Mr Khashoggi.
The crown prince, striking a defiant tone Wednesday, said "justice will be served in the end" during his first public remarks about the investigation into Khashoggi's death. He called the killing of Khashoggi a "heinous crime". Then on Saturday Riyadh admitted he had died in the consulate in what Turkey's president has called a "premeditated" and "brutal murder".
The Washington Post reported that Haspel heard an audio tape allegedly made of Khashoggi's interrogation and killing at the Saudi consulate in Istanbul on October 2.
A member of Saudi Crown Prince Mohammed bin Salman's entourage on foreign trips was seen at the consulate before the Washington Post columnist's slaying. While Saudi officials have since acknowledged that the kingdom's operatives were responsible for the journalist's killing, explanations for the exact cause and circumstances of his death have varied widely.
Earlier on Tuesday, the President told reporters at the White House that Saudi authorities had staged the "worst cover-up ever" over the incident, and that they had handled the matter badly. But Sabah, another pro-government newspaper, says Saudi Arabia has yet to give Turkish authorities permission for a search.