"You need to prove it". "Those who ask Turkish authorities, 'Where is he?' should first be asking, 'How did this happen?"'
At Khashoggi's instruction, Cengiz called when he failed to return from the consulate after four hours.
Fears are growing over the fate of missing journalist Jamal Khashoggi after Turkish officials said they believe he was murdered inside the Saudi consulate.
Turkey's foreign ministry on Wednesday summoned Saudi Arabia's ambassador over the issue.
Turkish President Recep Tayyip Erdogan said on Sunday that he was personally following the case and that the investigators were looking at all the camera records and monitoring airports. "Now, nobody will dare to speak and criticise the reforms [initiated by the crown prince]", he said, adding that "it would be much better for him to allow a breathing space for critics, for Saudi intellectuals, Saudi writers, Saudi media to debate".
Yemeni activist and 2011 victor of the Nobel Peace Prize, Tawakkol Karman, said it would be an "awful crime" if the claims of his death were true.
However, he was sacked from his post as an editor at Al-Watan, a liberal paper founded after the 9/11 terror attacks, just two months after he took the job in 2003. She added that she was waiting for official confirmation as the allegations circulated.
Saudi Arabia will pay a "heavy price" if allegations that the kingdom killed a prominent journalist prove true, said a senior Republican senator on Monday.
Khashoggi had gone to the consulate to receive an official document for their marriage.
Turkish President Tayyip Erdogan, whose AK Party is rooted in political Islam, also supported a government in Egypt led by the Muslim Brotherhood, which Saudi Arabia has designated a terrorist movement. Erdogan said of the consular officials.
The source further said that the interrogators later dismembered his body and the Saudi nationals took interrogation video with themselves to brief Saudi Crown Prince Mohammed bin Salman on his death, the source said.
"They took us from the top to the bottom of the building, it is a four-storey building, it was obviously an usual event they said they had never before opened their doors in such a way it clearly was an usual move for them", Evans said.
Erdogan said he would wait for the outcome of the current investigation before taking a decision.
Khashoggi had been critical of some of the crown prince's policies and Riyadh's intervention in the war in Yemen in Arab and Western media.
The 33-year-old crown prince, who was named heir to the throne in June 2017, has garnered global attention with his rapid rise to power as well as social and economic reforms. US silence in the face of such behavior may have partly induced Mohammed bin Salman into thinking that he could act against Khashoggi with impunity. He is imposing very selective justice. "The crackdown on even the most constructive criticism - the demand for complete loyalty with a significant "or else" - remains a serious challenge to the crown prince's desire to be seen as a modern, enlightened leader", he wrote.
A consummate insider, he advised Prince Turki al-Faisal, former Saudi intelligence chief, and has also been close to billionaire investor Prince Alwaleed bin Talal.
"Our country's values should be and must be a cornerstone of our foreign policy with foes and allies alike", said Graham.