"From the person who gave the order to the person who carried it out, they must all be brought to account".
Last week, Mr Trump toughened his stance on Saudi Arabia and described the killing and subsequent changing narratives from Riyadh as part of "the worst cover-up in the history of cover-ups". For example, this spring Saudi Arabia said it was open to building an Arab force to eventually replace the estimated 2,000 US troops operating in Syria.
Involved in this case is a disturbing flow of accusations and a complicated diplomatic state making it hard to keep track of the happenings of the Khashoggi case. It has also launched an ad campaign aimed at Saudi Arabia, and on Thursday dedicated a full page of the newspaper to a photograph of Crown Prince Mohammed bin Salman alongside the words "demand the truth". In the 1980s he was an embedded reporter with Osama Bin Laden's forces in Afghanistan and supported Al-Qaeda in that conflict.
While in the U.S., he wrote for Washington Post where he had a monthly column.
The sale of weapons "has nothing to do with Mr Khashoggi".
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That assertion, in turn, backtracked from an initial statement that Saudi authorities knew nothing about what happened to the columnist for The Washington Post, who vanished after entering the consulate on October 2.
Khashoggi had gone to the consulate for paperwork related to his planned marriage to Cengiz.
"With our collective interests in peace and unwavering respect for human rights in mind, the murder of Jamal Khashoggi in a diplomatic facility must concern us all greatly", Mattis said, indicating the issue could have potential ramifications for the USA relationship with Saudi Arabia.
For not less than 10 hours, Cengiz waited for Khashoggi. That came after assertions that he had left the consulate unharmed. Then, she raised an alarm. He said the 18 arrested men "must know" who killed him.
Khashoggi's fiancée also mentioned that no one from the Saudi Arabian government called her following Khashoggi's death.
"It was a total fiasco", he later added. "And, I think that sports is where we really find that common ground with each other". "It should have never happened".
Cengiz also received a phone call from U.S. Secretary of State Secretary of State Mike Pompeo, and recalled asking whether he had any news that would make her happy. The Saudi monarchy is a creation of the United States and the oil companies.
Trump and Prince Mohammed have cultivated warm ties though the USA president said earlier this week that the crown prince, as the kingdom's de facto ruler, bore ultimate responsibility for the operation against Khashoggi.
"Unless you tell, Saudi Arabia will not be free from this suspicion".
The German leader said she was prepared to take "appropriate measures together with worldwide partners" following the killing.
Turkey has been on the frontline trying to get justice for journalist Khashoggi.
"You need to show this body", Erdogan insisted on Friday, indicating that his country had more evidence about the killing to reveal.
A Turkish presidential source said Erdogan shared information about the case with Canada's Prime Minister Justin Trudeau during a phone call on Friday.
Riyadh later updated its version of events to say that evidence from Turkish investigators indicated that the killing had been premeditated, but maintained that his body had been wrapped in a rug and disposed of by an unnamed "local collaborator".