But questions remain, and most recently the Washington Post reported that Salman claimed in a phone call with USA officials that Khashoggi was risky and a member of the Muslim Brotherhood, which Khashoggi's family denies.
"The Kingdom of Saudi Arabia is among the wealthiest, most powerful, and most important nations in the Middle East, in all of history", the evangelical group's spokesman Johnnie Moore said.
A member of Sri Lankan web journalist association holds a placard during a protest condemning the murder of slain journalist Jamal Khashoggi in front of the Saudi Embassy in Colombo, Sri Lanka October 25, 2018.
On Wednesday, Turkey's chief prosecutor had said that Khashoggi was strangled to death as soon as he entered the Saudi consulate in Istanbul and that his body was then dismembered.
"Now we see that they did not only dismember his body but also vaporized it". "The treatment of the body is a separate crime".
"I believe it would not be right to tackle another stage before answering Turkey's questions", said Gul on the possible visit of the Turkish Attorney-General to Saudi Arabia.
The fiancee of murdered Saudi journalist Jamal Khashoggi called on Friday for President Donald Trump to back Turkey's efforts to investigate his death and recover his body. The call reportedly took place before Saudi authorities admitted that Khashoggi had been killed in the consulate.
The crown prince has denounced the murder as "repulsive" and denied any involvement.
Once an adviser to the Saudi royal family, Khashoggi fell out of favour with the government past year and went into self-imposed exile.
The affair has created Saudi Arabia's worst diplomatic crisis since 9/11 and sullied the reputation of the crown prince, Mohammed bin Salman, whom it is alleged must have been aware of the murder plan.
Saudi officials have offered varying explanations for how and why Khashoggi was killed on October 2. "In other words, we did not get the impression that they were keen on genuinely cooperating with the investigation", the official said.
Speaking at a journalism awards ceremony Thursday, Fred Ryan, Publisher and CEO of the Washington Post which Khashoggi wrote for, urged the Trump administration to take a tougher line.
Israel and the Sunni kingdom of Saudi Arabia are hostile toward Iran, a Shiite Muslim country, and are eager to reduce Tehran's influence in the region.
Khashoggi, 59, was the most powerful journalist in Saudi Arabia at one point of time and was very close to the ruling family. Riyadh assured that it is conducting a thorough investigation into the matter and announced that some 18 Saudi citizens had already been arrested in connection with the case.
Saudi Arabia's former intelligence minister, Prince Turki bin Faisal al Saud, said on Wednesday that the outcry in the United States demonizing Saudi Arabia over Khashoggi's killing threatened to disrupt strategic ties between the two countries.