The Kingdom initially said Khashoggi walked out of the consulate unharmed but then said Saudi agents had accidentally killed him in a fistfight, and more recently announced that it had evidence that his killing was "premeditated". He added that the Saudi officials who were still trying to cover up the killing should be discovered.
A group of USA evangelicals, including former Rep. Michele Bachmann (R-MN), held a rare meeting Thursday with Saudi Arabia's crown prince Mohammed bin Salman at his palace.
Turkish media had previously quoted sources as saying Khashoggi had been tortured.
Hilal Kaplan, a columnist at pro-government Turkish newspaper Daily Sabah, said that with this op-ed, Erdogan is trying to keep the Khashoggi case in the worldwide spotlight. The newspaper claimed that his fingers were cut off and that he was killed by being beheaded.
Etyen Mahcupyan, a Turkish political analyst and former adviser to ex-AK Party leader Ahmet Davutoglu said that Erdogan has taken an aggressive stance in his op-ed, but has made sure to keep good relations with Saudi Arabia.More news: Nigerian army deletes tweet that quoted Trump on protesters
The White House did not set up the meeting, a member of the delegation told The Post.
Other lawmakers urged the United States not to forsake justice for Khashoggi, in the interest of preserving trade interests with Saudi Arabia. We also know that those individuals came to carry out their orders: Kill Khashoggi and leave.
Saudi Arabia has not commented directly on the prosecutor's visit and Mr.al-Mojeb did not respond to journalists' questions at the airport as he departed. "We also noted that Saudi Arabia must extradite all 18 suspects to Turkey so that they can be held accountable for what they did", a senior Turkish official told CNN on Wednesday.
The Turkish president said his government had not yet located the body or identified a "local collaborator".
"We aren't here for a short-term objective", Bachmann told CBN News.
Erdogan said Friday the order for Khashoggi's killing came from the highest level of the Saudi government.More news: Lacazette: Arsenal believe we can can compete against Premier League elite
He complained that no action had been taken against the Saudi consul general, who has left Turkey, and accused the Saudi public prosecutor of failing to co-operate with the investigation "and answer even simple questions".
Turkey claims Khashoggi was strangled to death and dismembered after entering the consulate to pick up marriage documents. His Turkish fiancee was waiting for him outside.
Khashoggi, at the time of his death was a resident of the United States, contributing to the Washington Post, having fallen out with the Riyadh regime.
The New York Times, quoting two people familiar with the matter, reported Friday that White House officials knew from an October 9 phone call with Saudi Crown Prince Mohammed bin Salman that he considered Khashoggi a risky Islamist, and therefore knew the Saudi prince had a potential motive for the killing.
Saudi officials have offered varying explanations for how and why Khashoggi was killed on October 2.
It has arrested 18 suspects, who, it says, will be prosecuted in Saudi Arabia.More news: Mike Pence compares himself to Oprah while stumping in Georgia